Grayish-brown color (5)
I believe the answer is:
taupe
I believe this is a double definition.
'grayish' is the first definition.
(I've seen this in another clue)
'brown color' is the second definition.
(I know that taupe is a type of brown color)
(Other definitions for taupe that I've seen before include "Brownish-grey colour" , "Greyish brown" , "Fifty Shades of Grey must include this" , "Grey-brown colour" , "colour of moleskin" .)