Gloss over (6)
'gloss over' is the definition.
(to coat with enamel)
This is all the clue.
(Other definitions for enamel that I've seen before include "Glassy coating" , "Hard material" , "Dental material" , "hard stuff" , "Smooth hard paint" .)
'gloss over' is the definition.
(I know that gloss over can be written as whitewash)
This is the entire clue.
(Other definitions for whitewash that I've seen before include "Lime solution; cover up" , "Clean up or conceal the wall covering" , "Solution for painting walls - clean sweep of victories" , "Cover-up -- wall coating" , "Used on walls to cover up a misdemeanour?" .)