Related Clues:

• Stuntman wrestling a cobra — it's tense!
• Adobe file-name extension
• Many an emailed document
• Agile performer
• Common email attachment
• 'This puzzle is relatively easy,' say
• Going round Baltic capital, European put on a jumper?
• A Balkan native importing British tumbler
• One's success may be in the balance
• ____ Reader is free software used for displaying PDF files
• A Slav describing British trick cyclist?
• PC file that's shareable
• Circus act on a high wire, perhaps
• Common attached file
• E-book format, often