Actor ____ Dillon (4)
I believe the answer is:
matt
'actor dillon' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for matt that I've seen before include "Dull uniform finish" , "Non-gloss" , "Dull, lustreless" , "(Of surface) dull" , "Telegraph cartoonist" .)