What does the cryptic crossword clue "What goes into grandpa's tagliatelle? (5)" mean?

The definition is "tagliatelle?". The wordplay uses a hidden word. Hidden in "what goes into grandPA'S TAgliatelle?" The answer is Pasta.

What goes into grandpa's tagliatelle? (5)

Telegraph Prize Cryptic #3137 | 21 Down | 2021-12-05 flower