Flows out, as the tide
I believe the answer is:
ebbs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flows out as the tide</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 ebbs that I've seen before include "Wanes" , "Goes out like tide" , "Flows back - declines" , "Flows back or recedes" , "fades away" .)