It’s parallel to a dream team (9)
I believe the answer is:
alongside
'it's parallel to' is the definition.
(I've seen this before)
'a dream team' is the wordplay.
'dream' becomes 'long' (I've seen this before).
'team' becomes 'side' (both can mean a sports team).
'a'+'long'+'side'='ALONGSIDE'
(Other definitions for alongside that I've seen before include "close to a bank" , "Lying next to, as a boat might be" , "Side by side" , "Next to - alien dogs (anag)" , "next door" .)