Gray, in a way (4)
I believe the answer is:
ashy
'gray in a way' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ashy that I've seen before include "like Cinders" , "Cinders must have been this" , "Like fireplace residue" , "White" , "Like, eg, volcanic dust" .)