United team is in the driving seat, reportedly (5)
I believe the answer is:
leeds
'united team' is the definition.
(Leeds United football club)
'is in the driving seat reportedly' is the wordplay.
'is in the driving seat' becomes 'leads' (to be in the driving seat is to lead).
'reportedly' indicates a 'sounds like' (homophone) clue.
'leads' sounds like 'LEEDS'.
(Other definitions for leeds that I've seen before include "Yorkshire city - Kent castle" , "Yorks city" , "West Yorkshire city" , "W Yorkshire city" , "English city" .)