GEEWHIZ

Golly, quartet of geezers welcomes woman with greeting (3,4)

• Aw, shucks

• 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

• Heavens!

• Kin of My goodness!

• Wide-eyed cry