Gymnastic entertainer (7)
I believe the answer is:
acrobat
'gymnastic entertainer' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for acrobat that I've seen before include "Athletic Circus Performer" , "Circus gymnast" , "Agile circus performer" , "performer of risky feats?" , "Circus entertainer" .)