Crossword Genius

* Musical beehive maintainer? (9)

Ross

I believe the answer is:

hairspray

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'musical' is the definition.
(US musical)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for hairspray that I've seen before include "pressurised stuff?" , "fine solution" , "Barnet manager" , "setter" .)

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