This regiment has a kind of music rising above the sound of fire (9)
I believe the answer is:
parachute
'this regiment has a kind' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'music rising above the sound of fire' is the wordplay.
'music rising' becomes 'para' (I can't explain this - if you can you should believe this answer much more).
'above' means one lot of letters go next to another (in a down clue, some letters go above others).
'the sound of' shows a homophone (sound like).
'fire' becomes 'shoot' (shooting is a kind of firing).
'shoot' is a homophone of 'chute'.
'para'+'chute'='PARACHUTE'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for parachute that I've seen before include "Equipment for making a descent from an airplane" , "Equipment to break a fall from the sky" , "It breaks a fall from the sky" , "Devise for making descent from an airplane" , "Eat up char for something to break your fall" .)