Pained expression (7)

I think it could be either:

Which length description are you looking for?:

grimace

'pained expression' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for grimace that I've seen before include "Facial expression showing disgust, wry humour etc" , "Pained expression" , "Expression of pain or disgust" , "(Make) a wry face" , "Glower" .)

I've seen this clue in The Times.

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