Short assignment (6)
I believe the answer is:
errand
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">short assignment</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I have seen 'Short assignment ' mean 'errand' so perhaps 'assignment' could also mean 'errand'; 'short' suggests an abbreviation)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for errand that I've seen before include "Gone up" , "run one" , "Commission, message" , "Trip for small task" , "Mission (usually run!)" .)