geewhiz Interjection of surprise "Well, golly!" "Who'da thunk it?!" "Holy cow!": 2 wds Beaver Cleaver remark "Wow, you're a regular expert at turning left!" "Well, whaddya know?" "Gosh!" (or, based on the starts of starred answers, one who is expert at solving this puzzle's theme?) "Golly!" "Imagine that!" "Aw, shucks" Beaver Cleaver expletive ... or what you might need to be to answer 18-, 23-, 51- and 60-Across? "Wow, you're a regular expert at turning right!" "You don't say!" Kin of "My goodness!" Beaver Cleaver expletive