Exclusive odds about Bill's partner? (5)
I believe the answer is:
scoop
'exclusive' is the definition.
('scoop' can be a synonym of 'exclusive')
'odds about bill's partner?' is the wordplay.
'odds' becomes 'sp' (betting abbreviation for starting price).
'about' indicates putting letters inside.
'bill's partner?' becomes 'coo' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'sp' placed around 'coo' is 'SCOOP'.
Can you help me to learn more?
(Other definitions for scoop that I've seen before include "Large ladle" , "Find utensil" , "Dig out - story that makes the headlines" , "Exclusive report" , "Book by Evelyn Waugh (exclusive)" .)