Related Clues:

• 'I'm onto you!'
• Shout of surprise
• Lionel Richie song of greeting?
• Eric Clapton "___ Old Friend"
• 'What do we have here!'
• 'What's this!'
• "Is anybody home?"
• "So THAT's what's going on here!"
• 'Look what I found!'
• 'Well, what have we here!'
• Form of greeting he will love
• 'Well, look at that!'
• "So, that's it!"
• Nefarious piece of coding
• Palindromic exclamation of surprise