The most common and most likely answer to this crossword clue is the 4 letter word RAGA
R
A
G
A
More clues leading to the result RAGA
- Student event needs a piece of Indian music
- Hindu music's contribution to culture reversed
- Jazz piece and a composition for sitar?
- Musical form occupying learner again
- Scrap a musical genre
- Jelly set about establishing one form of music
- Piece of music from Agra, possibly
- Piece of jazz — a Hindu piece
- Music article presented by paper
- Gunners take silver for Indian tune
Buddy explains!

The straight part
We know that "musical pattern" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case musical pattern = raga.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does RAGA mean?
RAGA noun- Any of various melodic forms used in Indian classical music, or a piece of music composed in such a form.
- Passion, love, lust.