NYT Connections Green Group Hint

We’re going to go out on a limb and say this is a pretty powerful visual clue. (Or at least one that’ll make you laugh after the big reveal.) Will it get you to the finish line? That’s the catch—you still have to find the right words.
Need the verbal clue, too? These are four words you’ll find in Gray’s Anatomy (the book, not the show).
Give up? This was another doozy, so don’t feel too bad…
Today’s green group answer is Parts of the Ear and its words are ANVIL, CANAL, DRUM, and HAMMER.