Unhesitating (8)
I believe the answer is:
resolute
'unhesitating' is the definition.
(I know that unhesitating can be written as resolute)
This is all the clue.
(Other definitions for resolute that I've seen before include "Showing great determination, fully committed" , "Determined, firm" , "Firm-minded" , "Firm in purpose" , "Determined, unwavering" .)