Flavoured sausage regrettably returned with note (6)
I believe the answer is:
salami
'flavoured sausage' is the definition.
'salami' can be an answer for 'sausage' (salami is a kind of sausage). I am unsure of the 'flavoured' bit.
'regrettably returned with note' is the wordplay.
'regrettably' becomes 'alas' (I've seen this before).
'returned' says the letters should be written backwards.
'with' is a charade indicator (letters next to each other).
'note' becomes 'mi' (as in 'do re mi').
'alas' in reverse letter order is 'sala'.
'sala'+'mi'='SALAMI'
Can you help me to learn more?
(Other definitions for salami that I've seen before include "One kind of tactics" , "Highly spiced sausage" , "Banger" , "Cured meat" , "Food" .)