Mingled black and white (6-3-4)
I believe the answer is:
pepper-and-salt
'mingled black and white' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for pepper-and-salt that I've seen before include "Marked in a way suggesting condiments" , "Flecked dark and light" , "Mingled black and white" .)