Side with running mate (4)

I believe the answer is:

team

'side' is the definition.
(thesaurus)

'running mate' is the wordplay.
'running' indicates anagramming the letters.
'mate' is an anagram of 'TEAM'.

'with' acts as a link.

(Other definitions for team that I've seen before include "One side in a game" , "Side; harness (horses)" , "Group pulling together" , "Side in sporting event" , "Competitive side" .)

I've seen this clue in The Telegraph.

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