Soundly leads a united team (5)
I believe the answer is:
leeds
'a united team' is the definition.
(Leeds United football club)
'soundly leads' is the wordplay.
'soundly' indicates a 'sounds like' (homophone) clue.
'leads' sounds like 'LEEDS'.
(Other definitions for leeds that I've seen before include "City near Bradford" , "W Yorkshire city" , "Industrial city of northern England" , "City on River Aire" , "West Yorkshire city" .)