Water pitcher (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">water pitcher</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 ewer that I've seen before include "Open vessel with handle and spout" , "Pitcher, water jug" , "A wide-mouthed water-jug" , "Large water jug" , "Were (anag)" .)