Measure of capacity (6)
I believe the answer is:
bushel
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">measure of capacity</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bushel that I've seen before include "Imperial measure of liquid or dry capacity" , "Old measure of capacity" , "Unit of dry or liquid measure" , "Old grain measure" , "Four pecks" .)