Crossword Genius

Instruments musician initially on island played (9)

Ross

I believe the answer is:

'instruments' is the definition.
(mandolin is a kind of instrument)

'musician initially on island played' is the wordplay.
'initially' says to take the initial letters.
'played' indicates an anagram.
The initial letter of 'musician' is 'm'.
'on'+'island'='onisland'
'onisland' anagrammed gives 'andolins'.
'm'+'andolins'='MANDOLINS'

(Another definition for mandolins that I've seen is "instruments".)

I've seen this clue in The Times.