Continue to recruit, willy-nilly? (5,2)

I believe the answer is:

press on

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'continue' is the definition.
(to press on with something is to continue with it)

I cannot understand how the remainder of the clue works.

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(Other definitions for press on that I've seen before include "Continue going forward" , "Continue (with action)" , "Keep going forward" , "Continue (regardless)" , "Persevere doggedly, quickly" .)

I've seen this clue in the Evening Standard.

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