Large milk can (5)
I believe the answer is:
churn
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large milk can</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 churn that I've seen before include "Machine in which milk is beaten to make butter" , "Large milk vessel" , "Kind of barrel in which butter in made" , "Agitate - milk container" , "Kind of cask butter is made in" .)