Unites in making a stink (5)
I believe the answer is:
knits
'unites' is the definition.
(I've seen this before)
'making a stink' is the wordplay.
'making' indicates anagramming the letters.
'stink' is an anagram of 'KNITS'.
'in' is the link.
(Other definitions for knits that I've seen before include "Unites" , "Works with needles and wool" , "Purses" , "Stitches" .)