Related Clues:
- James Bond is one
- One wearing sunglasses, stereotypically
- Work covertly
- Nonnative plant?
- Be a secret watcher
- Bug catcher, maybe
- Mata Hari, i.e
- Person seeking intelligence?
- Window shopper, essentially
- One on an op
- Counter conclusion
- Intel accumulator
- Intel seeker
- Person wearing a trench coat and sunglasses, stereotypically
- Peephole spy