Crossword Genius

Water protozoan (6)

Ross

I believe the answer is:

amoeba

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">water protozoan</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 amoeba that I've seen before include "little creature" , "Protozoan of ever-changing shape" , "Constantly-changing one-celled creatures" , "Microscopic animal found in water" , "parasitic type" .)

I've seen this clue in The Sunday Times.
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