Team's wrong about gold - it's a great conductor (7)
I believe the answer is:
maestro
'a great conductor' is the definition.
(I've seen this in another clue)
'team's wrong about gold' is the wordplay.
'wrong' indicates anagramming the letters.
'about' says the letters should be written in reverse.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'or' reversed gives 'ro'.
'teams' with letters rearranged gives 'maest'.
'maest'+'ro'='MAESTRO'
'it's' is the link.
(Other definitions for maestro that I've seen before include "car" , "Top conductor" , "conductor, maybe" , "Eminent musician" , "Expert musician" .)