Anyway, Sid's in the Brentford team (7)
I believe the answer is:
besides
'anyway' is the definition.
(synonyms)
'in the brentford team' is the wordplay.
'in the' means one lot of letters goes inside another.
'brentford' becomes 'bes' (I can't explain this - if you can you should believe this answer much more).
'team' becomes 'side' (both can mean a sports team).
'bes' going around 'side' is 'BESIDES'.
'sid's' is the link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for besides that I've seen before include "See bids (anag)" , "Apart from" , "Moreover" , "What's more" , "Additionally" .)