A healthy colour in an instant (3)

I believe the answer is:

tan

'a healthy colour' is the definition.

'in an instant' is the wordplay.
'in' says the answer is hidden in the clue.
'TAN' is hidden within 'instant'.

(Other definitions for tan that I've seen before include "Reddish-brown" , "Brown to beat" , "Skin colour after exposure to ultraviolet rays" , "Sun-kissed" , "Turn dark in sun" .)

I've seen this clue in the Evening Standard.

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