Sunglasses (6)
I believe the answer is:
shades
'sunglasses' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for shades that I've seen before include "Nuances" , "'Tints, tones (6)'" , "Sunglasses, colloquially" , "disguise, sometimes" , "Sunglasses (informal)" .)