An employer's gambit? (4)

I believe the answer is:

ploy

I'm a little stuck... Click here to teach me more about this clue!

'gambit?' is the definition.
(I know that gambit can be written as ploy)

'an employer's' is the wordplay.
'PLOY' is hidden within the letters.
However, I am uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for ploy that I've seen before include "Ruse, stratagem" , "Cunning manoeuvre to gain advantage" , "Ruse or gimmick" , "Cunning tactic" , "Tactical scheme" .)

I've seen this clue in the Evening Standard.

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