Lively or courageous (8)
I believe the answer is:
spirited
I believe this clue is a double definition.
'lively' is the first definition.
(similar in meaning)
'courageous' is the second definition.
(similar in meaning)
(Other definitions for spirited that I've seen before include "Sparkling" , "Energetic, animated" , "with brio" , "Lively, in upbeat mood" , "Mettlesome" .)