Money? Some people like jam on it! (5)
I believe the answer is:
bread
'money?' is the definition.
(slang term for money)
'people like jam on it' is the wordplay.
I cannot really see how this works, but
'on' could be 're' ('on' can be mean 'with reference to') and 're' is present in the answer.
The remaining letters 'bad' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'some' is the link.
Can you help me to learn more?
(Other definitions for bread that I've seen before include "Dosh (slang)" , "Eg, pumpernickel" , "Staple food" , "Loaf; money" , "Foodstuff; money" .)