Did the crawl, say (4)
I believe the answer is:
swam
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">did the crawl say</span>' is the definition.<br/ ><span class="explanation-format__explanation">(doing the crawl is a kind of swimming)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for swam that I've seen before include "Travelled through water" , "Splashed around" , "Moved through water" , "was dizzy" , "Did butterfly perhaps" .)