The most common and most likely answer to this crossword clue is the 6 plus 4 letter word DOUBLE BASS
I've seen this crossword clue in The Sunday Telegraph
D
O
U
B
L
E
B
A
S
S
More clues leading to the result DOUBLE BASS
- Hypocritical dictator’s evil instrument
- Instrument, one in a lather, according to Spooner
- Abused slob playing instrument
- Clipped shot during game of tennis one’s played
- Run to get singer an instrument
- What might be played by graduates during tennis match?
- Instrument finds a sort of fault with fish
- Use Bob’s lad devised for instrument
Buddy explains!

The straight part
We know that "one’s played" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one’s played = double bass.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 DOUBLE BASS mean?
DOUBLE BASS noun- The largest stringed instrument of the violin family.
- The deepest of all male voices.