More frozen (5)
I believe the answer is:
icier
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">more frozen</span>' is the definition.<br/ ><span class="explanation-format__explanation">('icy' can be similar in meaning to 'frozen')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for icier that I've seen before include "with increased chance of freezing" , "much less friendly" , "More cold - really freezing" , "More glacial" , "With more hostility" .)