What is a 'real' philosopher and what is the true essence of philosophy ? What is the essence of philosophy? A quick and general answer would be that philosophy is about the fundamental topics that lie at the core of all other fields of inquiry, broad topics like reality, morality, knowledge, justice, reason, beauty, the mind and the will, social institutions of education and governance, and perhaps above all meaning, both in the abstract linguistic sense, and in the practical sense of what is important in life and why.
But philosophy is far from the only field that inquires into any of those topics, and no definition of philosophy would be complete without demarcating it from those other fields, showing where the line lies between philosophy and something else. Philosophy is not the same thing as religion, nor just sophistry; its not science, because it's independent of a posteriori facts, but neither is it just about ethics; and it's not the same thing as math, despite being all a priori, nor is it just a genre of literature, a form of art.
Philosophy uses the tools of mathematics and the arts, logic and rhetoric, to do the job of creating the tools of the physical and ethical sciences, i.e. for studying what is real and what is moral. It is the bridge between the more abstract disciplines and the more practical ones: an inquiry stops being science and starts being philosophy when instead of using some methods that appeal to specific contingent experiences, it begins questioning and justifying the use of such methods in a more abstract way; and that activity in turn ceases to be philosophy and becomes art or math instead when that abstraction ceases to be concerned with figuring out how to practically answer questions about what is real or what is moral, but turns instead to the structure or presentation of the ideas themselves.
Who is a real philosopher? The question is largely whether philosophy is a personal activity, or an institutional one. Given that I think that the faculty needed to conduct philosophy is literally personhood itself (sapience, consciousness and will), it should come as no surprise that I think that philosophy is for each and every person to do, to the best of their ability to do so.
Nevertheless, institutions are made of people, and I do value the cooperation and collaboration that has arisen within philosophy in the contemporary era, so I don't mean at all to besmirch professional philosophy and the specialization that has come with it. I merely don't think that the specialized, professional philosophers warrant a monopoly on the discipline.
It is good that there be people whose job it is to know philosophy better than laypeople, and that some of those people specialize even more deeply in particular subfields of philosophy. But it is important that laypeople continue to philosophize as well, and that the discourse of philosophy as a whole be continuous between those laypeople and the professionals, without a sharp divide into mutually exclusive castes of professional philosophers and non-philosophers. And it is also important that some philosophers keep abreast of the progress in all of those specialties and continue to integrate their findings together into more generalized philosophical systems.
But who is really "a real philosopher"? I feel torn between two answers.
On the one hand, if asked if someone else was "a real philosopher", I would just look at whether they do the activity that is philosophy, professionally or not; if they did any kind of study of those broad fundamental problems using those kinds of methods described above, I'd say yeah, they're a philosopher, especially if they wrote those thoughts down somewhere, or discussed them with others regularly.
But if asked if I was a "real philosopher"? I feel like I'd be compelled to answer "eh, not really", because I don't actually do this for a living.