Craving return of Queen brilliance (6)
I believe the answer is:
lustre
'brilliance' is the definition.
(I've seen this before)
'craving return of queen' is the wordplay.
'craving' becomes 'lust' (I've seen this in another clue).
'return of' says the letters should be written in reverse.
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'er' written backwards gives 're'.
'lust'+'re'='LUSTRE'
(Other definitions for lustre that I've seen before include "Reflected light, sheen" , "Sheen or renown" , "Gentle sheen/glow" , "Rustle with shine on surface" , "brilliance" .)