Unsightly (4)
I believe the answer is:
ugly
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unsightly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ugly that I've seen before include "'Unattractive, unsightly (4)'" , "Repulsive in appearance" , "Unsightly, not pretty" , "Disquieting" , "Not beautiful, plain" .)