Contagious (8)
I believe the answer is:
catching
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">contagious</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for catching that I've seen before include "Stopping and holding a moving object" , "Seizing" , "Snaring" , "getting infectious" , "Getting hold of or becoming infected" .)