Link to puzzle: http://www.thenation.com/article/176225/puzzle-no-3295
Degree of difficulty (by standards of this weekly puzzle): moderate, with a couple of obscure words
Hozom’s comment: “Deep Grammar” in which Hot and Trazom describe the grammatical conventions that govern clue writing and point out how one could bend those rules for the sake of a more-clever sounding clue.
I agree with them that there are some constructors who make good use of these grammatical twists, especially Richard Maltby and Stephen Sondheim, who both are professional lyricists. You know they’re good with verse.