Partner risked money left in care of troubled father (6,4)
I believe the answer is:
better half
'partner' is the definition.
(I've seen this before)
'risked money left in care of troubled father' is the wordplay.
'risked' becomes 'bet' (eg to bet money is to risk it).
'money left' becomes 'l' (I can't explain this - if you can you should believe this answer much more).
'in care of' means one lot of letters goes inside another.
'troubled' indicates anagramming the letters.
'father' is an anagram of 'terhaf'.
'l' going into 'terhaf' is 'terhalf'.
'bet'+'terhalf'='BETTER HALF'
Can you help me to learn more?
(Other definitions for better half that I've seen before include "partner" , "Wife (colloq.)" , "Spouse (informal)" , "One's spouse" , "Husband" .)