Like an unmatched sock (3)
I believe the answer is:
odd
'like an unmatched sock' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for odd that I've seen before include "like twenty two [FIFTEEN]? Yes and no!" , "standing out from the crowd?" , "Funny" , "Left over" , "Not matching" .)