Invading wasp in a chap’s vegetable (7)

I believe the answer is:

spinach

'vegetable' is the definition.
(spinach is a kind of vegetable)

'invading wasp in a chap's' is the wordplay.
'invading' indicates the answer is hidden within the clue (the answer has invaded the clue).
'SPINACH' can be found hidden inside 'wasp in a chap'.

(Other definitions for spinach that I've seen before include "Popeye the Sailor's vegetable of choice" , "Vegetable, source of iron" , "Leafy vegetable" , "Some greens" , "Dark green vegetable" .)

I've seen this clue in The Times.

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