Pure force grabbing can (8)
I believe the answer is:
pristine
'pure' is the definition.
(I've seen this in another clue)
'force grabbing can' is the wordplay.
'force' becomes 'prise' (as in forcing or prising something open).
'grabbing' is an insertion indicator.
'can' becomes 'tin' (both are metal containers).
'prise' enclosing 'tin' is 'PRISTINE'.
(Other definitions for pristine that I've seen before include "ancient" , "In original condition" , "Like new" , "Completely free of dirt" , "Original, unspoiled" .)