Befitting a king or queen (5)
I believe the answer is:
regal
'befitting a king or queen' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for regal that I've seen before include "Like a queen?" , "befitting a king" , "Befitting a monarch" , "King's" , "Royal - lager (anag)" .)