Charming to look at (6)
I believe the answer is:
pretty
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">charming to look at</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pretty that I've seen before include "Fairly - good-looking" , "charming to look at" , "See 19" , "like a kettle of fish" , "Facially attractive" .)