Kind of tide (4)
I believe the answer is:
neap
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">kind of tide</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that neap is a type of high tide)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for neap that I've seen before include "Small tide" , "Tide with the smallest vertical range" , "Tide with least fall and rise of water" , "It's between spring and ebb" , "The middle-sized tide" .)