Deals nuts out, being brave (9)
I believe the answer is:
dauntless
'being brave' is the definition.
(synonyms)
'deals nuts out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'deals'+'nuts'='dealsnuts'
'dealsnuts' is an anagram of 'DAUNTLESS'.
(Other definitions for dauntless that I've seen before include "Brave" , "Resolute" , "Intrepid" , "Boldly determined" , "Invulnerable to fear" .)