What does the cryptic crossword clue "One serving up Whoppers in trouble over recipe (4)" mean?

The definition is "One". The wordplay uses a reversal. AIL (reversal="trouble") + R (synonym="recipe") = LIAR The answer is LIAR.

One serving up Whoppers in trouble over recipe (4)

Independent Cryptic #12091 | 9 Across | 2025-07-10 flower