Uncommonly brave taking Latin oral (6)
I believe the answer is:
verbal
'oral' is the definition.
(thesaurus)
'uncommonly brave taking latin' is the wordplay.
'uncommonly' is an anagram indicator.
'taking' means one lot of letters go next to another.
'latin' becomes 'l'.
'brave' with letters rearranged gives 'verba'.
'verba'+'l'='VERBAL'
(Other definitions for verbal that I've seen before include "statement to police" , "It's said" , "Word of mouth" , "Relating to words" , "not written down" .)