The most common and most likely answer to this crossword clue is the 7 letter word MUSICAL
I've seen this crossword clue in Independent
M
U
S
I
C
A
L
More clues leading to the result MUSICAL
- Rent for one American in Michigan state
- American I caught in bad French show
- American going through two states to find, say, Oklahoma!
- Chess perhaps rendered us calm: one's absorbed
- With noted talent for “Oklahoma!” say?
- Extraordinary claims surrounding university entertainment
- Eg Annie’s extraordinary claims about university
- Cats, for example, calm us, I suspect
- Hair transplant claim involving setters?
- University dons fabricated claims about output from instruments?
Buddy explains!

The straight part
We know that "about output from instruments" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case about output from instruments = musical.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 MUSICAL mean?
MUSICAL noun- A stage performance, show or film that involves singing, dancing and musical numbers performed by the cast as well as acting.
- A meeting or a party for a musical entertainment; a musicale.
- Of, belonging or relating to music, or to its performance or notation.
- Pleasing to the ear; sounding agreeably; having the qualities of music; melodious; harmonious.
- Fond of music; discriminating with regard to music; gifted or skilled in music.
- Pertaining to a class of games in which players move while music plays, but have to take a fixed position when it stops; by extension, any situation where people repeatedly change positions.