Related Clues:

• Like shrinking violets
• Skittish
• Hardly gregarious
• Unlikely to raise one's hand in class
• A little short, as of money
• Wallflowery
• Self-conscious
• Reclusive
• Not forward
• Not open
• Far from a drama queen
• Not quite enough
• Averse to first moves, e.g.
• Like many a wallflower
• In arrears