What does the cryptic crossword clue "Bean curd content of uneaten sandwiches? (4)" mean?

The definition is "Bean curd". The wordplay uses a hidden word. Hidden (‘sandwiched by’) in contenT OF Uneaten The answer is TOFU.

Bean curd content of uneaten sandwiches? (4)

Independent Cryptic #11691 | 17 Across | 2024-03-30 flower