Walk on water? (4)
I believe the answer is:
pier
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">walk on water?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pier that I've seen before include "Breakwater; arch pillar" , "seaside location" , "Part of airport terminal; breakwater" , "Support for two adjacent bridge spans" , "Seaside attraction" .)