Possible Clues:

• Mark turning to Nick for school folder?
• Boy's broad starched turned-down part of shirt worn over jacket lapels
• Local tenor looks silly in stiff attire
• Mark turned to Nick; some posh schoolboys know it
• Neckwear tied on a roll etc
• Set the tone with appropriate neckwear for college students
• Having learnt cool manoeuvres, one assumed at school?
• What epitomises the stiffness of young toffs?
• One would ring schoolboy and not recall ring, oddly
• Money raised by cop for formal wear