Crossword Genius

Hand over whelp and dogs, lacking time on return (5,2)

Ross

I believe the answer is:

stump up

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'hand over' is the definition.
(both can mean to provide or give)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for stump up that I've seen before include "Pay (the money required) (colloq.)" , "Arrive on wooden leg" , "is what an umpire draws, at the end of the day" , "Pay a sum of money (colloq.)" , "Pay one's dues" .)

I've seen this clue in The Times.
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