Possible Clues:

• Used in a rude way
• Hardened as by experience
• Used to having undercooked, at lunchtime
• Hardened against, toughened
• Used to get broken in bits and ruined
• Accustomed to
• In you, this is ruddy well not like 9 across
• Habituated or hardened
• Get used in you, revolutionary
• Toughened through exposure