Brickwork

Enter the solutions to the clues in their numbered layers of the wall. Each word must be an anagram of its neighbours, plus or minus one letter.

1 Love affair 2 Bizet opera 3 Dairy product 4 Be concerned 5 Chris —, English singer-songwriter 6 Rabbit-like animal 7 Vital organ 8 Soapy foam 9 Related to heat production