Sheen (6)
'sheen' is the definition.
(I know that sheen can be written as lustre)
This is the entire clue.
(Other definitions for lustre that I've seen before include "brilliance" , "Reflected light, sheen" , "Polish" , "Radiance; reflective surface" , "Brilliant quality in a material, porcelain, etc" .)
(Other definitions for polish that I've seen before include "Language (linked to spitting?)" , "Rub to make the surface shine" , "European language - refinement" , "class" , "Shine up in Warsaw" .)
'sheen' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gloss that I've seen before include "explanation for obscure word" , "Provide explanations" , "Shiny surface" , "Show" , "Surface shine" .)