Frannie did the bulk of the work on this one, just calling me in to fill in about four or five squares at the end. Some highlights include EYEOFNEWT (14A: Classic brewing ingredient), HANKIE (20A: Cloth with tears in it?), IDES (26A: Middle marker?) - very nice clue for that oft-seen relic, POPO (40A: Law enforcers, slangily), and ASP (30D: Death on the Nile creator?) - ditto. The trickiest answer, in my opinion, was ADAMS (51A: Number one number two), which Frannie and I thought about and discussed for several minutes before coming to the conclusion that the "Number one" part means first, and the "number two" part means vice president.
Some lovely long fill today. SWANDIVES (10D: Elegant pool maneuvers), INDIRECT (12D: Glancing) (better clue than fill, but still…), ASPIRATE (32D: What Eliza didn't do for 'enry 'iggins?"), and CANTABILE (52A: Songlike). I like being reminded of the stubborn will of the Mahatma with SALTTAX (39D: Gandhi marched to the sea to protest one), and 38D: "The poetry of reality," per Richard Dawkins" is a nice clue for SCIENCE.
So anyway, it seemed like a good puzzle, but that's just my impression from reading through the clues, ex post facto. Plus, we've been out to dinner now with Huygens et ux., and I'm not really in any condition to write further on this.