Doctor tell age of instrument or bean? (9)

I believe the answer is:

flageolet

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'bean?' is the definition.
(flageolet is a kind of bean)

'doctor tell age of' is the wordplay.
'doctor' is an anagram indicator.
'tell'+'age'+'of'='tellageof'
'tellageof' is an anagram of 'FLAGEOLET'.

'instrument or' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.

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(Other definitions for flageolet that I've seen before include "Small flute" , "Instrument of the recorder family" , "Pipe" , "Blow me" , "bean!" .)

I've seen this clue in the Sydney Morning Herald.

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