Stir one's pot with a piece of cutlery (8)
I believe the answer is:
teaspoon
'piece of cutlery' is the definition.
(I've seen this before)
'stir one's pot with a' is the wordplay.
'stir' indicates an anagram.
'with' is an insertion indicator.
'ones'+'pot'='onespot'
'onespot' is an anagram of 'tespoon'.
'tespoon' enclosing 'a' is 'TEASPOON'.
(Other definitions for teaspoon that I've seen before include "Not Aesop (anag.)" , "With OAP onset, use it at table" , "Five millilitres (cookery)" , "which causes a stir!" , "5 ml container" .)