Showing a fancy for (4)
I believe the answer is:
into
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">showing a fancy for</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 into that I've seen before include "To a position within" , "Keen on (informal)" , "Teachers' trade union" , "Enthusiastic about" , "A fan of" .)