Possible Clues:

• Exploit computer key to copy both sides of advert
• Mischievous adventure has disturbed peace — sad
• Lark, and a dove initially, in flight
• Lark, notice, in flight
• Daring or adventurous act
• Flee across a delta in exciting adventure
• Bill hiding in skip — such a lark!
• Bit of tomfoolery
• Lark's short bill seen in flight
• Madcap episode