Possible Clues:

• Parisian's very old hat taken by Republican, an intruder
• One poaches, say, very French old-fashioned starter in restaurant
• Very unfashionable French redhead is an intruder
• France's extremely dated monarch, unwelcome visitor
• Criminal in France, very old-fashioned royal
• Intruder right to chase second ball lodged in tree
• He may well expect to face entrance charges