Iron clasp (5)
I believe the answer is:
press
This clue is a double definition.
'iron' is the first definition.
(I know that iron can be written as press)
'clasp' is the second definition.
(thesaurus)
(Other definitions for press that I've seen before include "demand immediate action" , "Harass; media" , "Crush - Fleet Street of old" , "Petition earnestly" , "part of the media" .)