Instrument used in some Kansas menagerie (5)

I believe the answer is:

kazoo

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

'some kansas menagerie' is the wordplay.
'some kansas' becomes 'ka' (I can't justify this - if you can you should give a lot more credence to this answer).
'menagerie' becomes 'zoo' (synonyms).
'ka'+'zoo'='KAZOO'

'used in' acts as a link.

Can you help me to learn more?

(Other definitions for kazoo that I've seen before include "Simple musical instrument" , "Toy-like instrument into which one hums" , "Toy wind instrument that buzzes" , "Humming toy" .)

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