Returning home unwell after rich cake and pasta (10)
I believe the answer is:
tortellini
'pasta' is the definition.
(tortellini is a kind of pasta)
'returning home unwell after rich' is the wordplay.
'returning' shows that the letters should be reversed in order.
'home' becomes 'in' ('he's home' can mean 'he's in').
'unwell' becomes 'i'll' (similar in meaning).
'after' means one lot of letters go next to another.
'rich' becomes 'torte' (I can't justify this - if you can you should give a lot more credence to this answer).
'in'+'ill'='inill'
'inill' back-to-front is 'llini'.
'llini' put after 'torte' is 'TORTELLINI'.
'cake and' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for tortellini that I've seen before include "Small filled pasta cases" , "Italian dish" , "Rings for food" , "pasta dish" , "Pasta is called for" .)