Related Clues:

• Bloke's 'Well, well!'
• Exclamation in 17, 23, 50 and 61-Across
• "Oh my!"
• 'Because ___ so!'
• "No kidding!"
• "___, old chap ..."
• Awed one's reaction
• Words to an old chap
• Take the right course
• Right call
• Londoner's exclamation
• ''You don't say!''
• Haw's counterpart
• 'Well, whaddya know!'
• ''Indeed!'' overseas