As worn during harvesting? (4)

I believe the answer is:

vest

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

'as worn during harvesting?' is the definition.
I can't judge whether this definition defines the answer.

'during harvesting?' is the wordplay.
'during' indicates the answer is hidden within the clue.
'VEST' is hidden within 'harvesting'.

Can you help me to learn more?

(Other definitions for vest that I've seen before include "Undergarment for vets" , "Waistcoat (in USA)" , "An American man's waistcoat" , "Upper undergarment, singlet" , "Undershirt, singlet" .)

I've seen this clue in the Evening Standard.

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