Objections about displaying butt (4)
I believe the answer is:
stub
'butt' is the definition.
(synonyms)
'objections about' is the wordplay.
'objections' becomes 'buts' (I've seen this before).
'about' is a reversal indicator.
'buts' backwards is 'STUB'.
'displaying' is the link.
(Other definitions for stub that I've seen before include "Extinguish the cigarette on a counterfoil" , "Objections after picking up" , "Returned part of a ticket" , "what smoker drops in street?" , "seen in the ash-tray" .)