Please help me decipher this calligraphy

[tapsig]

Hey community! I was gifted this piece of calligraphy. However, I am not sure what it means and/or how to decipher it.

Can you guys either help me with the kanji or recommend something I can use to narrow it down? Thank you so much, your help is very appreciated!

[Belthazar]

Perhaps 淳, though I confess I’m not overflowing with confidence.

[Thud]

Guessing 法 on first principle, but I’m not sure.

[Jonapedia]

Fairly sure it’s 清 written in 草書 (full cursive). Some other examples: