Crossword Genius

Hermetically sealed (8)

Ross

I believe the answer is:

airtight

'hermetically sealed' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for airtight that I've seen before include "Not allowing gas to pass" , "securely sealed" , "not letting out a breath?" , "Sure" , "Firmly closed" .)

I've seen this clue in The Times and The Sun.
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