Old invader cut call for Charlie Parker's instrument (9)
I believe the answer is:
saxophone
'old' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'invader cut call for charlie parker's instrument' is the wordplay.
'invader cut' becomes 'o' (I am not sure about this - if you are sure you should believe this answer much more).
'call' becomes 'phone' (phone can mean to call by telephone).
'for' means one lot of letters go next to another (I've seen this in other clues).
'charlie parker's instrument' becomes 'sax' (I've seen this in another clue).
'o'+'phone'='ophone'
'ophone' put after 'sax' is 'SAXOPHONE'.
Can you help me to learn more?
(Other definitions for saxophone that I've seen before include "Woodwind instrument" , "Brass wind instrument with reed in mouthpiece played by Charlie Parker" , "Jazz instrument" , "Musical instrument" , "Single-reed instrument" .)