Prepare a town for a speaker? How he laughs! (10)

I believe the answer is:

kookaburra

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'how he laughs' is the definition.
(kookaburras famously make a laugh-like sound)

I can't explain the remainder of the clue.

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(Other definitions for kookaburra that I've seen before include "Large kingfisher (aka laughing jackass)" , "winger in Australia" , "He may be laughing!" , "Australian bird" , "Australian kingfisher" .)

I've seen this clue in The Times.

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