Crossword Genius

Spent, having nothing else to pay? (3-2)

Ross

I believe the answer is:

all-in

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'spent' is the definition.
('all in' can mean exhausted)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for all-in that I've seen before include "Exhausted - comprehensive" , "Pooped" .)

I've seen this clue in The Times.
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