One of a kind (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one of a kind</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 unique that I've seen before include "Singular, different from others" , "incomparable" , "Sole" , "Singular, not like any other" , "Singular, without equal" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one of a kind</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for unit that I've seen before include "Part of a kit" , "Single person - group of people" , "- - trust" , "Separate part" , "Mexican maize pancake" .)