Related Clues:
- The hundred I had makes it a biting, detective matter
- So corrosive that it's a matter for the detectives
- So biting as to be a detective matter
- It's caustic
- A biting matter for the detectives
- Biting a branch of police
- After half a century you get quite caustic
- May be 17 across in a detective sort of way
- Litmus test result
- Highly caustic stuff
- Stomach product
- Drain-clearing chemical
- Drain-cleaner chemical
- Burning stuff
- __ rain