Trundling (7)
I believe the answer is:
rolling
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">trundling</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rolling that I've seen before include "Moving like a wheel" , "extremely rich" , "Moving on wheels" , "Type of stock" , "Going round - a type of mill" .)