You'll be surprised when this is raised! (7)

I believe the answer is:

eyebrow

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'you'll be surprised when this is raised' is the definition.
The definition suggests a singular noun which matches the answer.

This is all the clue.

Can you help me to learn more?

(Other definitions for eyebrow that I've seen before include "Arched line of facial hair" , "Facial hair (that can be raised)" , "feature one might raise?" , "Arch of hair" , "something going up doubtfully" .)

I've seen this clue in The Sun.

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