Related Clues:

• One of 31 across joined the old police in a CID form
• That lousy old force might be a CID matter
• __ acid: vitamin B9
• ___ acid (corrosive agent)
• Kind of acid in breakfast cereal
• ___ acid (protein builder)
• Kind of acid making Cockney skint
• Kind of acid used as mild antiseptic
• Type of acid used to repel roaches
• Essential ___ acid
• Kind of acid in asparagus
• Certain building block, informally
• PABA part
• __ acid: antiseptic cleaner
• What¿s inside Ursa Minor could be a compound acid