Related Clues:

• Thrash bloke producing geometric line
• One hears a sadly-spoken remark in an undertone
• Circle Line?
• Assistant holds last of talks in private
• Elvis's 'What'd I Say' vis-à-vis 'Viva Las Vegas'
• Out of one's thoughts
• Off-mike comment
• An actor's remark to the audience
• Comment starting 'By the way ...'
• Assistant suppressing second private comment
• Comment that might start with 96-Across
• New ideas heard in Hamlet
• Hitman line
• Function where Hazel gets a man
• A wing that's out of the way