… plus points for winning teams (7)
I believe the answer is:
upsides
'plus points' is the definition.
'winning teams' is the wordplay.
'winning' becomes 'up' (I've seen this in other clues).
'teams' becomes 'sides' (I've seen this before).
'up'+'sides'='UPSIDES'
'for' acts as a link.
(Other definitions for upsides that I've seen before include "Positive attributes" , "Positive aspects" , "Level" , "On a par (with); pie suds (anagram)" , "positive features" .)