Possible Clues:

• With Great North Road alongside part of Barnet one could get job in transport cafe
• Bunny Girl, say, with first-class tail
• Writes as badly as one putting down Fried Green Tomatoes at the Whistle Stop Cafe
• One offering 'A stew, sir?', taking order
• Flexible wise Tsar is capable of taking orders
• Restaurant worker with perfect hair
• She may serve 'sir' with a stew, carelessly
• She serves at table
• Is capable of taking orders from unorthodox wise Tsar
• Female server