Like a snail's trail (5)
I believe the answer is:
slimy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">like a snail's trail</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 slimy that I've seen before include "Glutinous" , "Oleaginous" , "toadying" , "Repulsively obsequious" , "Covered with slippery stuff, say mud" .)