Ill-advised (6)
I believe the answer is:
unwise
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ill-advised</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for unwise that I've seen before include "Not sensible or prudent" , "Ill-judged" , "Rash" , "Foolhardy" , "Not sensible, foolish" .)