Poker stake (4)
'poker stake' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ante that I've seen before include "Stake; before (Lat.)" , "'Behind, before (4)'" , "Fixed stake" , "Preceding birth" , "Pay" .)
(Other definitions for bet that I've seen before include "Speculation" , "'Stake, wager (3)'" , "Wager, speculate" , "Money risked on a gamble" , "Wager, back" .)