Ebb, go backwards (6)
I believe the answer is:
recede
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">ebb</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that ebb is a kind of recede)</span><br/ ><br/ >'<span class="explanation-format__original">go backwards</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for recede that I've seen before include "Withdraw" , "Go backwards" , "Move backward" , "Decree (anag) - ebb" , "Go back, ebb" .)