Fixed stake in agrarian terrain (4)

I believe the answer is:

ante

I'm a little stuck... Click here to teach me more about this clue!

'fixed stake' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for ante that I've seen before include "Preposition meaning before" , "expected from stake" , "Initial bet" , "Stake put up before the deal" , "Poker-player's stake before the deal" .)

I've seen this clue in The Sunday Times and The Times.

Want a hint initially instead of a full solution? Install my app