Ill-defined (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ill-defined</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for unclear that I've seen before include "Not apparent" , "hard to understand" , "Not obvious, obscure" , "Not distinct in nuclear way" , "Not transparent or intelligible" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ill-defined</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for vague that I've seen before include "Obscure, undefined" , "Not clearly expressed or perceived" , "Amorphous" , "Unclearly defined" , "Inexact" .)