Be bold enough (to) (4)
I believe the answer is:
dare
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">be bold enough to</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for dare that I've seen before include "Challenge of courage" , "Be bold enough (to)" , "Have the courage to try something" , "Dan - - , 'Eagle' pilot" , "Be brave enough" .)