Philosophy of Epicurus (8)
I believe the answer is:
hedonism
'philosophy of epicurus' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hedonism that I've seen before include "System based on pleasure as the highest good" , "Search for fun" , "Pleasure-seeking" , "The pursuit of and devotion to pleasure" , "Living for pleasure" .)