Possible Clues:

• Key feature of Restaurant at the End of the Universe?
• It is found on a keyboard
• Cause of division between characters in Star Wars cantina?
• Key opening hostelry
• Block put on room key
• It's used to separate characters in the pool
• Second group of lawyers accept speed is key
• Key to breaking one's words where one would have a drink by sea of tranquility?
• Thumb key
• It's used by typist, but not for letters