Purpose; employ (3)

I believe the answer is:

use

I believe this clue is a double definition.

'purpose' is the first definition.
(synonyms)

'employ' is the second definition.
(synonyms)

(Other definitions for use that I've seen before include "Milk" , "Habitually employ" , "Exploit unfairly" , "Employ or exploit" , "Resort to - operation" .)

I've seen this clue in The Telegraph.

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