Credit given to adult in charge of a good time (5)
I believe the answer is:
craic
'a good time' is the definition.
(I've seen this before)
'credit given to adult in charge' is the wordplay.
'credit' becomes 'cr'.
'given to' is a charade indicator (letters next to each other).
'adult' becomes 'a' (abbreviation).
'in charge' becomes 'ic' (abbreviation for 'in charge').
'cr'+'a'+'ic'='CRAIC'
'of' acts as a link.
(Other definitions for craic that I've seen before include "Irish pub fun?" , "good time" , "In Irish bars you'll get this" .)