Feverish cold (5)
I believe the answer is:
chill
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">feverish cold</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for chill that I've seen before include "Slight cold" , "Unpleasant coldness in the air" , "Refrigerate" , "Iciness" , "nip" .)