Related Clues:

• Earth's heirs?
• Not quite enough
• Averse to first moves, e.g.
• Like many a wallflower
• Tractable
• Not outgoing
• Lacking determination
• Hard to discern
• Far from bold
• Like wallflowers
• Sudden start
• Quaking in one's boots
• Not camera-ready?
• Indebted to the pot, in poker lingo
• Earth's inheritors