Related Clues:

• Speak with your hands
• Exemplar of straightness
• Gemini, for one
• Feathered missile
• Speak manually
• Retina receptor
• Finalize a contract
• Tell tale missile
• Not just initial
• Object in a quiver
• Plus or minus, e.g.
• Formally agree
• Agree to, in a way
• It's in peak shape
• Certain geometric solid