Possible Clues:

• Model has a little time in place of worship
• Agency typist departed - it's the pattern
• Model office worker departed
• Model employer's complaint about unpunctual office worker?
• Blueprint
• Mould -- problem for office manager?
• Model coming back met dish
• Model of Parthenon, say, consuming a ton
• Model office worker keeping you waiting?
• Tense wild tale about European politician and model