Possible Clues:

• Ahem relative
• "___ Jude" (Beatles hit)
• "Ahem" cousin
• ''Watch out!''
• 'What's the idea?!'
• and 27 down, as if by magic it's been cut, by the sound of it
• See 21 across for the sound of the fodder
• "___! Wait! I got a new complaint..." (Nirvana lyric)
• 'Watch it, buster!'
• With 64-Down and 64-Down, Fat Albert's catchphrase