Crossword Genius

Occasionally play Greek instrument (4)

Ross

I believe the answer is:

lyre

'instrument' is the definition.
(lyre is a kind of instrument)

'occasionally play greek' is the wordplay.
'occasionally' means one should take alternating letters.
'play'+'greek'='playgreek'
The alternate letters of 'playgreek' are 'LYRE'.

(Other definitions for lyre that I've seen before include "Old instrument, like a harp" , "used to produce music" , "Instrument played by Orpheus" , "Type of harp" , "Music-maker" .)

I've seen this clue in The Telegraph.
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