Hilarity after ringing expression of disgust (8)
I believe the answer is:
laughter
'hilarity' is the definition.
(I've seen this before)
'after ringing expression of disgust' is the wordplay.
'after' becomes 'later' (I've seen this in another clue).
'ringing' indicates putting letters inside.
'expression of disgust' becomes 'ugh' (I've seen this before).
'later' enclosing 'ugh' is 'LAUGHTER'.
(Other definitions for laughter that I've seen before include "Manifestation of amusement" , "Hilarity" , "Sound of merriment" , "The expression of lively amusement" , "Cackling" .)