Related Clues:

• Biting this with your tongue, to wit
• So corrosive that it's a matter for the detectives
• One may have soda with it to make the crows sound stuck
• Biting, to wit, in a manner of speaking
• Biting, in a manner of speaking, so Da
• So biting as to be a detective matter
• Might so Da follow this to make the sound of the crow stick?
• A biting matter for the detectives
• Biting a branch of police
• Sound of the crows might make sound of the clock sound biting
• May be 17 across in a detective sort of way
• 'Does the end of 13 across stick to the end of this, by the sound of it? (7)'
• 'Sounds like a biting stick for a crow, by the sound of it (7)'
• Will the sound of the rook stick here, by the sound of it?
• Litmus test result