Crossword Genius

Flood defence (4)

Ross

I believe the answer is:

dyke

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flood defence</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for dyke that I've seen before include "Boundary earthwork" , "Flood embankment" , "Defensive earthwork" , "Flood defence" , "Anti-flood ditch/wall" .)

I've seen this clue in The Times and The Independent.
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