Earn exclamation of disgust (5)
I believe the answer is:
gross
I believe this clue is a double definition.
'earn' is the first definition.
(gross can mean to earn)
'exclamation of disgust' is the second definition.
(someone disgusted might shout 'gross')
(Other definitions for gross that I've seen before include "Horribly large" , "Very fat - indecent" , "extremely fat" , "Coarse; repulsive" , "Coarse and crude" .)