Grave words I draw upon following extreme pressure ending in death (7)

I believe the answer is:

epitaph

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

I can't explain the rest of the clue.

(Other definitions for epitaph that I've seen before include "Gravestone inscription" , "last words" , "Words inscribed on a tomb" , "Tomb inscription" , "Words inscribed on tombstone." .)

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

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