Possible Clues:

• Is __ (probably will)
• Likely will, after 'is'
• “The larger crimes are ___ be the simpler”: Sherlock Holmes
• It's often read on faces
• Prone
• 'I shall not find myself so ___ die': Antony
• Most likely will, after "is"
• Is -- (has a penchant for)
• Likely will, with "is"
• ___ blow (unstable)