Rest cooking utensil upside down (3)
I believe the answer is:
nap
'rest' is the definition.
(thesaurus)
'cooking utensil upside down' is the wordplay.
'cooking utensil' becomes 'pan' (pan is a kind of cooking utensil).
'upside down' says the letters should be written in reverse.
'pan' reversed gives 'NAP'.
(Other definitions for nap that I've seen before include "A brief informal sleep" , "raised bits of velvet" , "Kip" , "Racing tip that claims to be a certainty" , "Short sleep on soft surface texture?" .)