Concept (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">concept</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that idea is a type of concept)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for idea that I've seen before include "Notion, image" , "Thought, conception" , "Theory" , "Purpose" , "Notion, belief" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">concept</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I have seen 'A concept' mean 'thought' so perhaps 'concept' could also mean 'thought')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for thought that I've seen before include "Performed brain operations" , "Study" , "Supposed" , "Cogitated" , "Thinking process" .)