… worst risks son's raised (4)
I believe the answer is:
best
'worst' is the definition.
(both can mean to beat someone)
'risks son's raised' is the wordplay.
I cannot really see how this works, but
'son's' could be 's' and 's' is present in the answer.
The remaining letters 'bet' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
(Other definitions for best that I've seen before include "First < outdo < top" , "George -, footballer" , "Most excellent - late football star" , "most fitting" , "Worst -- as good as can be" .)