Host and current queen (9)
I believe the answer is:
presenter
'host' is the definition.
(e.g. for a television show)
'current queen' is the wordplay.
'current' becomes 'present' (similar in meaning).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'present'+'er'='PRESENTER'
'and' acts as a link.
(Other definitions for presenter that I've seen before include "TV person" , "TV introducer" , "Radio/TV personality" , "Broadcast introducer" , "Disc jockey" .)