Solution: Pipe part - NYT Crossword

Do you want to have a ton of fun? If you live in London, or you have a chance to go there, try mudlarking. [This has to do with the puzzle, right? — Ed.] [Yes. Eventually. — D.A.] A former colleague who grew up in London turned me on to this. The foreshore of the Thames is a veritable treasure trove of ancient pottery shards, glass bottles, coins, and sailors’s clay pipe STEMs [See? — D.A.] that are just lying on the sand, because the river has never been dredged. You need a permit to mudlark, but definitely give it a try. Your inner archaeologist will thank you.