What taught one to have smaller bets? (6)
I believe the answer is:
lesson
'what taught one to' is the definition.
I can't judge whether this definition defines the answer.
'smaller bets?' is the wordplay.
'smaller' becomes 'less' (less great in size).
'bets?' becomes 'on' (I can't explain this - if you can you should give a lot more credence to this answer).
'less'+'on'='LESSON'
'have' is the link.
Can you help me to learn more?
(Other definitions for lesson that I've seen before include "Reading or exercise to be studied" , "Sermon or class session" , "Sermon or teaching session" , "corrective punishment" , "A sermon or tutorial" .)