Perforation, with central piece removed, ruined early keyboard instrument (10)
I believe the answer is:
fortepiano
'keyboard instrument' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for fortepiano that I've seen before include "keyboard instrument" , "Old source of music" .)
I've seen this clue in The Independent.
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