Brick Trick

Enter the answers to the clues in the bricks in the wall. Every word is an anagram of its neighbours, plus or minus a letter.

1 Ominous, thunderous (8) 2 Definition (7) 3 Puzzle (6) 4 Reflection (in a mirror) (5) 5 Monopoly or Scrabble, eg (4) 6 Time of life (3) 7 Squall (4) 8 Ring-shaped bun (5) 9 Mix up, jumble (6) 10 Maths using letters and symbols (7) 11 Open to question (8)