Barman from The Queen coming into money shortly (6)
I believe the answer is:
brahms
'barman' is the definition.
(Johannes Brahms, writer of bars of music)
'the queen coming into money shortly' is the wordplay.
'the queen' becomes 'hm' (abbreviation for Her Majesty).
'coming into' indicates putting letters inside.
'money shortly' becomes 'bras' (I can't justify this - if you can you should believe this answer much more).
'hm' inserted into 'bras' is 'BRAHMS'.
'from' acts as a link.
(Other definitions for brahms that I've seen before include "German barman" , "German scorer" , "Musician" , "He scored" , "Composer of A German Requiem" .)