Possible Clues:

• Amass (debts?)
• Accumulate, as debt
• Raise the standard in course at university
• Bowler's approach?
• Looking back, play on words on old city approach
• A single, revolting approach
• Hurriedly appear prior to delivery
• Approach game with attempt at humour taken the wrong way
• Approach demonstrated by old railwaymen?
• Approach rugby union joke the wrong way