Is Her Majesty supporting Hammond perhaps for manager? (9)
I believe the answer is:
organiser
'manager?' is the definition.
(I've seen this before)
'is her majesty supporting hammond perhaps' is the wordplay.
'her majesty' becomes 'er' (Elizabeth Regina).
'supporting' is a charade indicator (letters next to each other) (in a down clue, some letters go below others).
'hammond perhaps' becomes 'organ' (Hammond organ is a musical instrument).
'is'+'er'='iser'
'iser' after 'organ' is 'ORGANISER'.
'for' acts as a link.
(Other definitions for organiser that I've seen before include "One in charge" , "One making arrangements" , "bound to keep personal data" , "Rosie rang the person in charge of the arrangements" , "arranger" .)