Indispensable (10)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">indispensable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for essential that I've seen before include "something necessary" , "Key" , "organic" , "So is certain oil-production" , "Type of oil" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">indispensable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(associated in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for necessary that I've seen before include "the money?" , "Essential or unavoidable" , "Inescapable" , "Indispensable, essential" , "Requisite" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">indispensable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for basic that I've seen before include "Fundamental -- early computer language" , "Key" , "No-frills" , "vital" , "At the simplest level" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">indispensable</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 vital that I've seen before include "Essential, life-giving" , "Necessary for life" , "Urgently needed or absolutely necessary" , "Essential to life, indispensable" , "Desperately important" .)
(Other definitions for invaluable that I've seen before include "Extremely useful" , "Priceless" .)