Related Clues:
- Dental fixative
- Dentist's adhesive
- Binding agent
- Driveway material, sometimes
- It hardens when wetted
- Binding substance as for bricks
- Stuff that binds or bonds
- It hardens when water is added
- Building material to bind things
- Ingredient of concrete
- It's used to make concrete
- Powder substance to make concrete
- Being hard up, I've got only a cent about me
- It's said to follow the pronoun, just to make it hard
- This will be hard to be 13 across