Pleasure-seeker, curiously, might have done this (8)
I believe the answer is:
hedonist
'pleasure-seeker' is the definition.
(I've seen this before)
'might have done this' is the wordplay.
'done this' can be anagrammed to 'HEDONIST'.
Though, I am unsure how the anagram is indicated.
'curiously' is the link.
Can you help me to learn more?
(Other definitions for hedonist that I've seen before include "Seeker of sensual pleasure" , "He believes pleasure is the chief good in life" , "A seeker after luxury" , "One who believes in pleasure" , "playboy" .)