Difficult to catch (7)
I believe the answer is:
elusive
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">difficult to catch</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 elusive that I've seen before include "Hard to find" , "Transient" , "Use veil to be difficult to catch" , "Evil use (anag.)" , "Vile sue is hard to catch" .)