Lustre (5)
'lustre' is the definition.
(I know that lustre can be written as sheen)
This is all the clue.
(Other definitions for sheen that I've seen before include "place in London" , "Surface gloss" , "Patina" , "Surface shine" , "Glow" .)
'lustre' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for gloss that I've seen before include "Shine, lustre" , "Misleading explanation" , "Show" , "phrase's explanation" , "High shine" .)
(Other definitions for polish that I've seen before include "Shine up in Warsaw" , "elegance" , "taught in finishing school?" , "Give shine to" , "Beeswax, for example" .)