Supremo jittery, hiding display of feeling (5)

I believe the answer is:

emoji

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'feeling' is the definition.
I know nothing about this answer so I can't tell whether this works.

'supremo jittery hiding' is the wordplay.
'hiding' indicates a hidden word.
'EMOJI' is hidden within 'supremo jittery'.

'display of' is the link.

Can you help me to learn more?

(Another definition for emoji that I've seen is " Graphic expression".)

I've seen this clue in The Guardian.

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