Bet on others for support (4,4)

I believe the answer is:

back rest

'support' is the definition.
(thesaurus)

'bet on others' is the wordplay.
'bet' becomes 'back' (I've seen this in other clues).
'on' means one lot of letters go next to another.
'others' becomes 'rest' (I've seen this before).
'back'+'rest'='BACK REST'

'for' is the link.

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.