Top hat in America and China (5,5)
I believe the answer is:
crown derby
'china' is the definition.
(I've seen this before)
'top hat in america' is the wordplay.
I cannot quite understand how this works, but
'top' could be 'crown' (crown can mean the top of something) and 'crown' is present in the answer.
'hat' could be 'derby' (derby is a kind of hat) and 'derby' is found in the answer.
No letters remain.
This explanation may well be incorrect...
'and' is the link.
Can you help me to learn more?
(Other definitions for crown derby that I've seen before include "China? - with 22a" , "type of porcelain" , "Service" , "Kind of porcelain" , "Brand of china" .)