More repulsive shopkeeper, by the sound of it? (7)
I believe the answer is:
grosser
'more repulsive' is the definition.
'shopkeeper by the sound of it?' is the wordplay.
'shopkeeper' becomes 'grocer' (I've seen this before).
'by the sound of it?' shows a homophone (sound like).
'grocer' sounds like 'GROSSER'.
(Other definitions for grosser that I've seen before include "More corpulent" , "more vulgar" .)