Related Clues:
- Something found after test in the London Underground
- Plymouth pattern?
- Knitted diamond design
- Bank, say, most efficient at breaking out in depravity
- Pipe - Underground?
- Long, hollow cylinder
- Underground - cylinder
- Pipe (with trains?)
- Pipe - railway
- Lozenge-patterned sock
- Of diamond - patterned material
- Diamond-shaped knitting pattern
- Diamond knitting pattern
- Underground transport
- Design of diamond-shaped patterns — Plymouth ___, football team