Destroy party stealing silver (6)
I believe the answer is:
ravage
'destroy' is the definition.
(I know that ravage is a kind of destroy)
'party stealing silver' is the wordplay.
'party' becomes 'rave' (type of dance party).
'stealing' is an insertion indicator.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'rave' going around 'ag' is 'RAVAGE'.
(Other definitions for ravage that I've seen before include "Lay waste, plunder" , "Sack" , "Cause extensive destruction" , "Greatly damage, destroy" , "Devastate, damage extensively" .)