Cook let us in with a rolling pin perhaps (7)
I believe the answer is:
utensil
'a rolling pin perhaps' is the definition.
(rolling pin is a kind of utensil)
'cook let us in' is the wordplay.
'cook' indicates anagramming the letters.
'let'+'us'+'in'='letusin'
'letusin' with letters rearranged gives 'UTENSIL'.
'with' is the link.
(Other definitions for utensil that I've seen before include "Can opener, for example" , "A container for kitchen use" , "A tool for household use" , "Gadget" , "Implement for practical use" .)