Answer: MANHOLES
The answer MANHOLES has 13 possible clues. See the results below.
Possible Clues:
- Main entrances?
- Spooner's Chinese spies showing means to go underground
- Sewer system entry points
- Street openings for underground work
- Street's accesses to sewer systems
- Sewer system entrances
- Channel ports offering entry for underground workers
- Openings for utility workers
- Street openings
- Ways to get under the street