Circus feature a proportion backed - radio broadcast for the rest? (7)
I believe the answer is:
trapeze
'circus feature' is the definition.
(item used by acrobats in a circus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for trapeze that I've seen before include "Swing used by circus acrobats" , "Circus attraction" , "Flying bar for acrobatics" , "Aerobatic device" , "Circus bar on ropes" .)