A game loses pounds for him! (4)
I believe the answer is:
otto
'him' is the definition.
'a game loses pounds for' is the wordplay.
I cannot quite understand how this works, but
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is found in the answer.
The remaining letters 'ot' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for otto that I've seen before include "A man" , "German emperor" , "Something oily" , "Cooker" , "German king" .)