Heedfulness (7)
I believe the answer is:
caution
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">heedfulness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for caution that I've seen before include "Attention to possible danger" , "Admonish - warning" , "Give a warning to" , "Vigilance" , "Caveat, prudence" .)