Writer Zane ____ (4)
I believe the answer is:
grey
'writer zane' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for grey that I've seen before include "Drab colour" , "Mix of black and white" , "(Of weather) dull, cloudy" , "Sombre colour" , "Colour of lead" .)