Title raising is supported by queen (3)
I believe the answer is:
sir
'title' is the definition.
(I've seen this before)
'raising is supported by queen' is the wordplay.
'raising' is a reversal indicator.
'supported by' is a charade indicator (letters next to each other) (letters go below - in down clue).
'queen' becomes 'r' (r is abbreviation regina. e.g. in ER ).
'is' written backwards gives 'si'.
'si'+'r'='SIR'
(Other definitions for sir that I've seen before include "Title given to 10 Across" , "Polite or formal address to male" , "Knight's prefix" , "Formal term of address" , "Title of 1 across" .)