Stopper's team come together for opener (9)
I believe the answer is:
corkscrew
'opener' is the definition.
(tool for opening wine bottles)
'stopper's team come together' is the wordplay.
'stopper's' becomes 'cork's' (cork is a kind of stopper).
'team' becomes 'crew' (crew is a kind of team).
'come together' says to put letters next to each other (letters join together).
'corks'+'crew'='CORKSCREW'
'for' acts as a link.
(Other definitions for corkscrew that I've seen before include "Spiral device for wine lovers" , "Wine bottle opener" , "Move in a spiral manner" , "Bordeaux might require this?" , "This might help one who gets in the drink" .)