Does it sound highly comical? (6)

I believe the answer is:

scream

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'it sound highly comical?' is the definition.
The definition suggests a singular noun which matches the answer.

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

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(Other definitions for scream that I've seen before include "noise?" , "Screech" , "Piercing yell" , "Comic" , "cry loudly" .)

I've seen this clue in the Evening Standard.

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