Retailer's voice is more repulsive (6)
I believe the answer is:
grocer
'retailer's' is the definition.
(I've seen this before)
'voice is more repulsive' is the wordplay.
'voice' indicates a 'sounds like' (homophone) clue (I've seen 'voiced' mean this).
'is more repulsive' becomes 'grosser' (I've seen this in another clue).
'grosser' is a homophone of 'GROCER'.
(Other definitions for grocer that I've seen before include "Food supplier" , "Merchant who sells foodstuffs" , "Dealer in foodstuffs and household goods" , "Provision merchant" , "Provisions purveyor" .)