Crossword Genius

Purposeful employment? (3)

Ross

I believe the answer is:

use

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'employment?' is the definition.
(how something is used)

I can't explain the rest of the clue.

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(Other definitions for use that I've seen before include "Value" , "Employ - advantage" , "Consumption" , "Expend in amusement" , "Custom - service" .)

I've seen this clue in The Globe and Mail.
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