Fearless, adventurous (8)
I believe the answer is:
intrepid
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">fearless</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">adventurous</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for intrepid that I've seen before include "Undaunted" , "Novel" , "Afraid not" , "Invulnerable to fear" , "'Brave, dauntless (8)'" .)