Joined team (6)
I believe the answer is:
united
I believe this clue is a double definition.
'joined' is the first definition.
(uniting is a kind of joining)
'team' is the second definition.
(name of many soccer teams)
(Other definitions for united that I've seen before include "Joined together like Manchester soccer team" , "See 1" , "Untied (anag.)" , "Of one mind" , "Allied, standing together" .)