Sealed item Charles almost smashed (10)

I believe the answer is:

hermetical

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

'item charles almost smashed' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'smashed' indicates anagramming the letters.
'item'+'charles'='itemcharles'
'itemcharles' with its last letter removed is 'itemcharle'.
'itemcharle' anagrammed gives 'HERMETICAL'.

(Another definition for hermetical that I've seen is " sealed".)

I've seen this clue in The Telegraph.

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