This automatically works for the better (4)
I believe the answer is:
tote
'this automatically works' is the definition.
The definition suggests a singular noun which matches the answer.
'for the better' is the wordplay.
'for' becomes 'to' (eg both can mean 'in the opinion of').
'the better' becomes 'te' (I can't justify this - if you can you should give a lot more credence to this answer).
'to'+'te'='TOTE'
Can you help me to learn more?
(Other definitions for tote that I've seen before include "record of stakeholders' investments" , "move" , "Carry - betting system" , "Carry (a gun)" , "system that could be for the better" .)