The most common and most likely answer to this crossword clue is the 7 letter word THEORBO
T
H
E
O
R
B
O
More clues leading to the result THEORBO
- Hooter modified to cover front of brass instrument
- Instrument or article with two round objects
- Instrument broken? O, bother!
- Instrument found in box office after brief speculative view
- The man put in new robot for old instrument
- The ball began oddly with lute-like instrument
- Nasty slur withdrawn from soul brother playing instrument
Buddy explains!

The straight part
We know that "instrument" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case instrument = theorbo.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 THEORBO mean?
THEORBO noun- A baroque, double-necked lute having an extra set of open bass strings.