What does the cryptic crossword clue "Part of central London toured by female engine driver? (7)" mean?

The wordplay uses a hidden word. SOHO (synonym="“part of central London”") in GAL (synonym="“female”") = GASOHOL The answer is GASOHOL.

Part of central London toured by female engine driver? (7)

Guardian Cryptic #29538 | 5 Across | 2024-11-12 flower