Robbery snares academic pleasure-seeker (8)
I believe the answer is:
hedonist
'pleasure-seeker' is the definition.
(thesaurus)
'robbery snares academic' is the wordplay.
'robbery' becomes 'heist' (heist is a kind of robbery).
'snares' means one lot of letters goes inside another.
'academic' becomes 'don' (I've seen this before).
'heist' enclosing 'don' is 'HEDONIST'.
(Other definitions for hedonist that I've seen before include "playboy" , "bon vivant" , "Thrill-seeker" , "A seeker after luxury" , "One who believes in pleasure" .)