Crossword Genius

Employ a hearty couple until exhausted (3,2)

Ross

I believe the answer is:

use up

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'employ' is the definition.
(thesaurus)

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(Other definitions for use up that I've seen before include "Finish, exhaust" , "Expend" , "Completely consume" , "Exhaust (resources)" , "Consume (stocks)" .)

I've seen this clue in the Evening Standard.
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