Related Clues:

• Short, in a way
• Lacking backbone
• Far from aggressive
• Hardly forward
• Inclined to avoid the spotlight
• Clark Kent-like
• Easily scared
• Averse to first moves
• Apt to shy, as a horse
• Short at the poker table
• Like Piglet
• Wallflower-ish
• Slow to mix, say
• Not likely to make the first move
• Reluctant to meet people, say