Answer

If you mean “song” in Jain Prakrit, the common word is gīt. Jain devotional songs also use gīt in this way. For the broader idea of musical art, kalā can include singing and playing musical instruments in the Prakrit dictionary tradition. ( jainpedia.org)

Explanation

So, depending on context:

• gīt = song
• kalā = musical art / singing / instrumental skill ( jainpedia.org)

Takeaway

If you want, I can also give you the Prakrit spelling in Devanagari.