You fake broadcast? I'm not sure this can be played (9)
I believe the answer is:
euphonium
'this can be played' is the definition.
(euphonium is a type of musical instrument)
'you fake broadcast? i'm not sure' is the wordplay.
I cannot really see how this works, but
'you' could be 'u' (commonly used in online communication) and 'u' is located in the answer.
'broadcast?' could be 'on' (I've seen this in other clues) and 'on' is located in the answer.
'i'm' could be 'i' (I've seen this in other clues) and 'i' is found in the answer.
'not sure' could be 'um' (both might be said when unsure about something) and 'um' is present in the answer.
The remaining letters 'eph' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for euphonium that I've seen before include "Producer of notes" , "Brass band instrument" , "Band member" , "Wind instrument" , "Tuba-like instrument" .)