Possible Clues:

• Seven-bone clusters
• Bones extracted from Qatar site
• Sailor's first to injure bones in foot
• Number of ankle parts is, one might tell, rising
• Rat is gnawing bones
• When broken they could cause a stir
• Iodine applied to sailors' bones
• Foot parts
• Bones starts to run as Spock is taken ill
• One's rather upset, disposing of her bones