Caught sight of philosophy writer (6)
I believe the answer is:
viewed
'caught' is the definition.
('view' can be a synonym of 'catch')
'sight of philosophy writer' is the wordplay.
I cannot quite understand how this works, but
'sight' could be 'view' (synonyms) and 'view' is located in the answer.
'writer' could be 'ed' (I've seen this in other clues) and 'ed' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for viewed that I've seen before include "Watched" , "Considered or looked at" , "Looked at, inspected" , "seen on TV" , "Observed" .)