The most common and most likely answer to this crossword clue is the 11 letter word METAPHYSICS
I've seen this crossword clue in The Daily Telegraph
M
E
T
A
P
H
Y
S
I
C
S
More clues leading to the result METAPHYSICS
Buddy explains!
The straight part
We know that "type of philosophy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case type of philosophy = metaphysics.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does METAPHYSICS mean?
METAPHYSICS noun- The field of study of metaphysics.
- The metaphysical system of a particular philosopher or of a particular school of thought.
- A fundamental principle or key concept.
- The branch of philosophy which studies fundamental principles intended to describe or explain all that is, and which are not themselves explained by anything more fundamental; the study of first principles; the study of being insofar as it is being (ens in quantum ens).
- The view or theory of a particular philosopher or school of thinkers concerning the first principles which describe or explain all that is.
- (by extension from the philosophical sense) The metalogic of physics; The logical framework of physics.
- (by extension from the philosophical sense) Any fundamental principles or rules.
- The study of a supersensual realm or of phenomena which transcend the physical world.
- Displeasingly abstruse, complex material on any subject.