Called for or lacked (6)
I believe the answer is:
needed
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">called for</span>' is the first definition.<br/ ><span class="explanation-format__explanation">('need' can be a synonym of 'call for')</span><br/ ><br/ >'<span class="explanation-format__original">lacked</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for needed that I've seen before include "Obligatory" , "Missing" , "'Lacked, required (6)'" , "Required; sounds like worked (dough)" , "Lacked something essential" .)