What does the cryptic crossword clue "Salt in ravioli, but never penne, ultimately (5)" mean?

The definition is "Salt". The wordplay uses acrostic. last letters of "in ravioli, but never penne," = NITRE; definition: "Salt" The answer is NITRE.

Salt in ravioli, but never penne, ultimately (5)

Times Cryptic #29079 | 22 Down | 2024-11-20 flower