Help in the kitchen? Cook let us in (7)
I believe the answer is:
utensil
'help in the kitchen?' is the definition.
(item used in a kitchen)
'cook let us in' is the wordplay.
'cook' indicates an anagram.
'let'+'us'+'in'='letusin'
'letusin' anagrammed gives 'UTENSIL'.
(Other definitions for utensil that I've seen before include "Containers for kitchen use" , "Useful tool" , "Let us in (anag) -- implement" , "Implement for practical use" , "Tool for practical use" .)