Sent back, utensils crack (4)
I believe the answer is:
'crack' is the definition.
'sent back utensils' is the wordplay.
'sent back' says the letters should be written in reverse.
'utensils' becomes 'pans' (pan is a kind of utensil).
'pans' reversed gives 'SNAP'.
(Other definitions for snap that I've seen before include "Break suddenly with cracking sound", "Family helper", "Bite at or utter angry words", "Crack - shot", "21 [PHOTO]".)