Crossword Genius

Lift up belly in pool (7)

Ross

I believe the answer is:

jackpot

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'pool' is the definition.
(pool of winnings or prize money)

'lift up belly' is the wordplay.
'lift up' becomes 'jack' (jacking is a kind of lifting. I am not sure about the 'up' bit.).
'belly' becomes 'pot' (synonyms).
'jack'+'pot'='JACKPOT'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for jackpot that I've seen before include "Large cash prize" , "best prize!" , "pool" , "The big pay-out - hit it" , "First prize" .)

I've seen this clue in The Telegraph.
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