Shopkeeper reportedly more offensive (6)
I believe the answer is:
grocer
'shopkeeper' is the definition.
(I've seen this before)
'reportedly more offensive' is the wordplay.
'reportedly' shows a homophone (sound like).
'more offensive' becomes 'grosser' ('gross' can be similar in meaning to 'offensive').
'grosser' sounds like 'GROCER'.
(Other definitions for grocer that I've seen before include "Chesterton's wicked tradesman" , "Food dealer" , "Shopkeeper selling food" , "Retail merchant" , "Shopkeeper who sells food and household goods" .)