Quite an enjoyable Saturday puzzle. I got very little on my first pass - I remember KAYAK (27A: Travelocity competitor), ANTHRACITE (28D: Stone coal), and TAUTEST (58A: Furthest stretched) going in right away. I considered TOLEDAN (34A: El Greco, after age 36), but didn't like it well enough to enter it until I was forced to. I also hobbled Frannie with such errors as "foreigners" for OUTLANDERS (4D: Xenophobe's bane), "Titan" for DIONE (44A: Moon of Saturn), and "prime" for CPLUS (18D: 79, say) (very nice). But she was unfazed. When I got it back, all of the bottom was done, and there was a lot to grab onto up top. Ahem.
Lot's of great, tricky cluing. 9D: One given to brooding (HEN), 13D: Spots likely to smear (ATTACKADS), 17A: Edible in a cone (PINENUT), and 33D: Dennis in "Monty Python and the Holy Grail," e.g. (SERF), to name but four.
Two interesting new facts in the NW today, the first of which (the less interesting) being that TADLINCOLN was the 18A: Onetime White House resident with a cleft palate. The second, that Sam SNEAD was the 21A: Only man ever to win an L.P.G.A. Tour Tournament (1962). I read that he also entered the tournament in 1961, but lost to Louise Suggs. I thought that maybe he was also the only man to have lost an L.P.G.A. tournament, but that doesn't seem to be the case. Other men were, apparently, entered in the 1961 tournament. Very interesting. Oh, and I didn't know CHEROOT (15A: Cigar with clipped ends) either, but that's the least interesting of the three.
Loved CABOOSE (1A: Keister) starting things off (although it was almost the last thing entered), and overall, there was little to dislike.
A fine Saturday.
p.s. I almost forgot to mention that we were driving along the banks of the ISERE just the other day!