Related Clues:

• Briefly near abandoning literary style? I am surprised
• 'Huh, never would've figured'
• ''Watch where you're going!''
• Tag end?
• 'I'm talkin' to you!'
• 'Watch it, mister!'
• ___-whiz technology
• Intrusion acknowledgment
• 'Well, fancy that!'
• 'Hmm'
• 'Who knew?'
• 'That's impressive!'
• Haw alternative
• Naive utterance
• With 61-Down, Jimi Hendrix's first single ... or a hint to the starts of 20-, 28-, 45- and 50-Across