Possible Clues:

• Swing and catch with comfort, say
• Swingers' bar from which partners are picked up?
• Start to get a bit backward if it's flying without difficulty, by the sound of it
• Circus bar
• Sounds as if one might capture it without difficulty if it were flying
• Catcher's apparatus
• Circus act some recalled with facility on the radio
• Six down's swing
• Net with comfort, we hear, a circus feature?
• Hold-up at the circus