Darken just a touch (5)

I believe the answer is:

shade

This clue is a double definition.

'darken' is the first definition.
(I know this)

'a touch' is the second definition.
(both can mean a small amount)

'just' acts as a link.

(Other definitions for shade that I've seen before include "blind" , "Hue" , "Colour; slight amount" , "Colour; protection from sun" , "Partial or comparative darkness" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app