1D Large reception room at Palace of Versailles (4-2-5) O - I - DE B - E - F (possibly boeuf?
30D White argillaceous rock used for doorsteps (9) C - L - S - A - E (Possibly slate or shale??)
7D Fail to mix as with water and oil (5) R - P - L (Assume repel but not sure why!!)