Possible Clues:

• Porter is about to dispatch messenger
• Matthew or Simon
• John or James
• Bartholomew, for one
• Send drink outside for messenger
• Preacher makes pleas to convert
• One of 12 at the Last Supper
• Vigorous campaigner's job, intervening in possible source of drunkenness
• One of twelve might get a job with the French
• To lapse (anag) — ardent supporter of a cause