Queen wears frilly material -- king gets shiny coat (7)
I believe the answer is:
lacquer
'shiny coat' is the definition.
(I know that lacquer are glistening)
'queen wears frilly material king' is the wordplay.
'queen' becomes 'qu' (abbreviation for queen).
'wears' means one lot of letters goes inside another.
'frilly material' becomes 'lace' (I've seen this in another clue).
'king' becomes 'R' (abbreviation of Latin rex).
'qu' going within 'lace' is 'lacque'.
'lacque'+'r'='LACQUER'
'gets' is the link.
(Other definitions for lacquer that I've seen before include "A hard glossy varnish" , "Hard shiny covering on wood and metal" , "Gloss varnish" , "Shiny varnish" , "protective cover" .)