Crossword Genius

Get rid of only an old instrument (7)

Ross

I believe the answer is:

sackbut

'old instrument' is the definition.
(I've seen this before)

'get rid of only' is the wordplay.
'get rid of' becomes 'sack' (as in sacking a worker).
'only' becomes 'but' (but can mean only - eg 'life is but a dream').
'sack'+'but'='SACKBUT'

'an' is the link.

(Other definitions for sackbut that I've seen before include "Musical instrument of the Renaissance" , "Old instrument" , "one blows into it" , "Ancient musical instrument" , "music maker" .)

I've seen this clue in the Evening Standard.
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