Ornamental water feature (8)
I believe the answer is:
fountain
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ornamental water feature</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 fountain that I've seen before include "Man-made jet of water" , "Spurt" , "Artificially-produced jet of water" , "Give out" , "Fan out in ornamental water jet" .)