Shouts of disapproval (4)

I think it could be either:

Which length description are you looking for?:

boos

'shouts of disapproval' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for boos that I've seen before include "Shouts of derision" , "Shows disapproval" , "Sounds of disapproval" , "Shouts of disapproval" , "Catcalls" .)

I've seen this clue in The Independent and the Universal.

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