Toothpaste type (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">toothpaste type</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gel that I've seen before include "Semi-solid" , "Begin to work" , "Mousse" , "Become jelly-like" , "Jelly-like substance for leg" .)