Swing door fronting facility for the audience (7)
I believe the answer is:
trapeze
'swing' is the definition.
(I know that trapeze is a type of swing)
'door fronting facility for the audience' is the wordplay.
I cannot really understand how this works, but
'door' could be 'trap' (trap door is a kind of door) and 'trap' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for trapeze that I've seen before include "Apparatus for circus acrobats" , "circus act" , "Flying circus apparatus?" , "Acrobatic apparatus" , "Swing used by circus acrobats" .)