Firm forged our steel (8)
I believe the answer is:
resolute
'firm' is the definition.
('resolute' can be similar in meaning to 'firm')
'forged our steel' is the wordplay.
'forged' indicates an anagram.
'our'+'steel'='oursteel'
'oursteel' is an anagram of 'RESOLUTE'.
(Other definitions for resolute that I've seen before include "Showing great determination, fully committed" , "Reels out (anag.)" , "'Firm, unhesitating (8)'" , "Determined, intent" , "Determined or decided" .)