Promoted team relegated -- it's over! (6,4)
I believe the answer is:
upside down
'over' is the definition.
(thesaurus)
'promoted team relegated' is the wordplay.
'promoted' becomes 'up' (I've seen this in other clues).
'team' becomes 'side' (both can mean a sports team).
'relegated' becomes 'down' (as in going down a league in football).
'up'+'side'+'down'='UPSIDE-DOWN'
'it's' acts as a link.
(Other definitions for upside down that I've seen before include "The wrong way up" , "at sixes and sevens" , "Inverted" , "in disarray" , "in a chaotic manner" .)