Had a gesture encapsulated an entire proverb? (5)

I believe the answer is:

adage

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'proverb?' is the definition.
('adage' can be a synonym of 'proverb')

'had a gesture encapsulated an entire' is the wordplay.
'ADAGE' is hidden in amongst the letters.
However, I am uncertain how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for adage that I've seen before include "Axiom" , "Well-remembered proverb or saying" , "Old saying, maxim" , "Old saw" , "True proverb or saying" .)

I've seen this clue in the Sydney Morning Herald.

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