Resisted and passed on snatching iron up! (6)
I believe the answer is:
defied
'resisted' is the definition.
('defy' can be a synonym of 'resist')
'passed on snatching iron up' is the wordplay.
'passed on' becomes 'died' (I've seen this before).
'snatching' means one lot of letters goes inside another.
'iron' becomes 'Fe' (Fe is the chemical symbol for iron).
'up' is a reversal indicator (in down clue: letters go upwards).
'fe' written backwards gives 'ef'.
'died' placed around 'ef' is 'DEFIED'.
'and' acts as a link.
(Other definitions for defied that I've seen before include "Stood up to" , "Confronted with resistance" , "Refused ot obey, confronted" , "Boldly refused to obey" , "Challenged or braved" .)