Contents of course as opposed to previous one (9)
I believe the answer is:
antipasti
'contents of course' is the definition.
'antipasti' can be an answer for 'course' (I've seen this before). I'm not sure about the 'contents of' bit.
'opposed to previous one' is the wordplay.
'opposed to' becomes 'anti' (anti means opposing something).
'previous' becomes 'past' (similar in meaning).
'one' becomes 'i' (Roman numeral).
'anti'+'past'+'i'='ANTIPASTI'
'as' acts as a link.
Can you help me to learn more?
(Other definitions for antipasti that I've seen before include "that's served in trattoria" , "Italian appetisers" , "Italian hors d'oeuvres" , "hors d'oeuvre selection" , "first course" .)