Which musical instruments name means made of clay in sanskrit

I think it could be the mridangam. A double ended drum. Check out The World Of Mridangam (http://planetmridangam.tripod.com/Mridangam/about.html)

Mridangam is correct in its meaning for what you have asked.
But it is no longer made of clay.

Ghatam (musical pot) is another drum instrument which is
Still made with clay.

http://chandrakantha.com/articles/indian_music/ghatam.html

which musical instruments name means made of clay in sanskrit
मृत्कृत