Related Clues:

• Con quest?
• Prepare to take off, perhaps
• End of a sentence?
• Hood release?
• Solve a knotty problem?
• Let out conditionally
• Set off a Geiger counter
• Opposite of absorb
• Give off, as rays
• Prisoner's hope
• Remove a ribbon
• Pull some strings?
• Let out early
• Send off, as broadcast waves
• Throw off, as light