What does the cryptic crossword clue "Lies flat in blind spot at first (4)" mean?

The definition is "Lies". The wordplay uses acrostic. first letters of "flat in blind spot" = FIBS; definition: "Lies" The answer is FIBS.

Lies flat in blind spot at first (4)

Times Cryptic #28945 | 20 Across | 2024-06-17 flower