Aw, shucks
Else clues• Golly!
• Gosh! (or, based on the starts of starred answers, one who is expert at solving this puzzle's theme?)
• Imagine that!
• Shucks
• Wow!
• Beaver Cleaver remark
• Golly, quartet of geezers welcomes woman with greeting (3,4)
• Heavens!
• Kin of My goodness!
• Wide-eyed cry