Peculiarity that couples never have? (7)
I believe the answer is:
oddness
'peculiarity' is the definition.
(I've seen this in another clue)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for oddness that I've seen before include "It isn't even" , "Curious state" , "a peculiarity of character" , "Peculiar quality" , "Peculiarity characteristic" .)