The most common and most likely answer to this crossword clue is the 5 plus 4 letter word STEEL DRUM
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More clues leading to the result STEEL DRUM
- Arab perhaps holding large, unusual musical instrument
- Sound of Rob — band’s latest member with strange instrument
- Nick overheard beginning to design strange instrument
- Determination and spirit after first of defeats — one’s beaten
- One’s beaten horse, stifling liberal spirit
- Rob caught Dutch liquor in pan
- Horse crossing line shown by odd instrument
- Horse fed large alcoholic drink, one of those beaten
- Horse carrying learner goes to drink — it’s hit with stick in group
- Disorder resulted before start of match that’s played by West Indians
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 = steel drum.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.