Requiring hotels for sons, go up and down Bray (6)

I believe the answer is:

heehaw

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

I can't explain the remainder of the clue.

(Other definitions for heehaw that I've seen before include "Imitation of a donkey's sound" , "Written bray of a donkey" , "Sound from the stable?" , "Cry of a mule" , "Braying sound of donkey" .)

I've seen this clue in The Times.

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