Pageant winner (5)
I believe the answer is:
'pageant winner' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for queen that I've seen before include "Powerful woman" , "powerful man on board" , "Sovereign - bee" , "Rock group; royal personage" , "who collaborated musically with 14 [BOWIE]" .)