Cleaner reprimands mourner (6-7)
I believe the answer is:
carpet sweeper
'cleaner' is the definition.
(I've seen this before)
'reprimands mourner' is the wordplay.
'reprimands' becomes 'carpets' (carpet can mean to heavily criticise).
'mourner' becomes 'weeper' (weeper is a kind of mourner).
'carpets'+'weeper'='CARPET-SWEEPER'
(Other definitions for carpet sweeper that I've seen before include "cleaning device" , "Domestic cleaning equipment" , "Cleaning equipment - we respect a rep (anag)" , "Floor cleaner" , "Household appliance" .)