Hanger-on (8)
I believe the answer is:
parasite
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hanger-on</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for parasite that I've seen before include "Twenty five dn [LEECH]" , "Possibly tick" , "unwanted guest" , "It depends on the host" , "Relies on host to survive" .)