Singular (6)

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">singular</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that singular can be written as unique)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for unique that I've seen before include "One-off" , "Singular, without equal" , "Unlike anything else" , "Alone of its kind" , "Sole" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">singular</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for only that I've seen before include "Except that; single" , "Siblingless (child)" , "Existing alone with no other, perhaps a child" , "Single, solitary" , "See 6" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">singular</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 lone that I've seen before include "Companionless" , "He likes to operate by himself" , "Single and isolated" , "Sole" , "Solitary, sounds like advance" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">singular</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for solitary that I've seen before include "Confinement" , "Recluse" , "Lacking companions" , "Isolated; hermit" , "Being the only one" .)
(Another definition for onefold that I've seen is " Simple".)