Shouts out agreement about a fifty-fifty arrangement (5)
I believe the answer is:
yells
'shouts out' is the definition.
('yell' can be a synonym of 'shout out')
'agreement about a fifty-fifty arrangement' is the wordplay.
'agreement' becomes 'yes' (saying yes to something).
'about' means one lot of letters goes inside another.
'a fifty fifty arrangement' becomes 'll' (I am not sure about this - if you are sure you should believe this answer much more).
'yes' placed around 'll' is 'YELLS'.
Can you help me to learn more?
(Other definitions for yells that I've seen before include "Shouts loudly" , "Cries out" , "Screams" .)