Once abstinent drifter admitted becoming party animal? (9)
I believe the answer is:
extrovert
'party animal?' is the definition.
(I've seen this before)
'once abstinent drifter admitted' is the wordplay.
I cannot really understand how this works, but
'once' could be 'ex' (prefix meaning former or onetime) and 'ex' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'becoming' is the link.
Can you help me to learn more?
(Other definitions for extrovert that I've seen before include "party type" , "Outgoing type" , "being for going out" , "Outgoing (personality)" , "show-off" .)