Odds? Yes and no (5)
I believe the answer is:
evens
'odds?' is the definition.
(I've seen this in other clues)
'yes and no' is the wordplay.
I cannot quite understand how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
The remaining letters 'eves' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for evens that I've seen before include "Odds offering equal chance of win or lose" , "Exchange, substitute" , "Balanced odds" , "Level odds?" , "Makes equal" .)