Crossword Genius

Brief shows of resentment, usually (5)

Ross

I believe the answer is:

demos

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'brief shows' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Perhaps you can see a link between them that I don't see?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for demos that I've seen before include "The populace" , "mass rallies?" , "protests" , "The common people" , "The people (Greek)" .)

I've seen this clue in the Evening Standard.
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