Extremely important part of everything (4)

I believe the answer is:

very

I'm a little stuck... Click here to teach me more about this clue!

'extremely' is the definition.
(very can mean extremely or considerably)

'important part of everything' is the wordplay.
'VERY' is hidden within the letters.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for very that I've seen before include "Actual; in a high degree" , "Exceedingly" , "To a high degree or extent" , "type of light" , "jolly British!" .)

I've seen this clue in The Globe and Mail.

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