Peculiarity (6)
'peculiarity' is the definition.
(I know that peculiarity can be written as oddity)
This is the entire clue.
(Other definitions for oddity that I've seen before include "one's mathematical quality?" , "Quality of strangeness" , "Something unusual or curious" , "Something peculiar, person or event" , "Strange occurrence, person or thing" .)
'peculiarity' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oddness that I've seen before include "Peculiar quality" , "a peculiarity of character" , "It isn't even" , "Curious state" , "Peculiarity characteristic" .)