Related Clues:
- Slinky, essentially
- Send a telegram
- Hidden mike, slangily
- It may be barbed
- Lamp-to-plug link
- Upgrade one's alarm
- End opposite the starting gate
- Hay, hot or high ender
- One may be used in a sting
- Informant's accessory
- Bra insert
- Electrician's hookup
- Make some new connections in
- Undercover apparatus
- Something an undercover agent might wear