Spiny marine creature (3,6)
I believe the answer is:
sea urchin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spiny marine creature</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 sea urchin that I've seen before include "A problem for barefoot dabblers" , "Marine animal with globular body" , "marine echinoderm" , "Marine life form" , "spineless creature" .)