Related Clues:

• Not having quite enough money
• Easily startled
• Loath to mingle
• Embarrassed with cigarette remains in a bed
• Still owing
• Not big on social events, say
• Not likely to pipe up
• Unlikely to make the first move
• Uneffusive
• Embarrassed or disconcerted
• Embarrassed at call for silence at journey's end
• Just short of retiring
• Not at all forward
• Smitten with shame
• Shunning the spotlight, maybe