The best in American murders? Chilling things for consumption (3,6)
I believe the answer is:
ice creams
'chilling things for consumption' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'the best in american murders?' is the wordplay.
'the best' becomes 'cream' (as in 'the cream of the crop').
'in' is an insertion indicator.
'american murders?' becomes 'ices' (slang term. I am not sure about the 'american' bit.).
'cream' inserted into 'ices' is 'ICE-CREAMS'.
Can you help me to learn more?
(Another definition for ice creams that I've seen is " puddings?".)