Heavy cart (4)
I believe the answer is:
dray
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">heavy cart</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for dray that I've seen before include "Nest in tree" , "Cart without sides, for delivering barrels" , "Cart for carrying heavy goods" , "Cart used for heavy loads" , "Heavy load-carrying vehicle" .)