What does the cryptic crossword clue "Saleswoman in eating area by motorway (9)" mean?

The wordplay uses a charade (building blocks). MI (synonym="motorway") + DINETTE (synonym="eating area") = MIDINETTE The answer is MIDINETTE.

Saleswoman in eating area by motorway (9)

Guardian Cryptic #29586 | 8 Down | 2025-01-08 flower