It's a real menagerie in here! Well, if you count three animals and an insect as a menagerie. I'm trying to figure out if there's a deeper layer of meaning in this theme other than four well-known phrases which have a living creature preceded by the definite article. When I first finished it, I thought, well, we just had the Chinese lunar New Year: they're all animals of the Chinese Zodiac, except for the bee. So I guess not.
In any case, I've always loved the phrase THEBEESKNEES (look at all of those Es!), and THEMONKEYSPAW is a perfect little thrilling story. I have never partaken of THEHAIROFTHEDOG, despite having a perfectly good dog in the house. And EYEOFTHETIGER is iconic, so a good set of theme answers.
The rest of the puzzle is reasonably smooth, with a few notable exceptions. I'm always going to raise an eyebrow at something like 49D: Suffix with direct or deposit (ORY). That's a real stretch, but I can see how the choices were limited. Other short fill like EEO and ITO are more acceptable to help a puzzle come together.
On the positive side, 11D: "I know you think this is a ludicrous idea, but ..." (HEARMEOUT) is excellent, as is MYMISTAKE. Also, I've always been fond of AIMEE Mann.
Anyway, that's ENOS of that.
P.S. For some reason, I missed that each theme answer also has a body part. Also, it's a debut, so congratulations to Mr. Schlossberg!