Related Clues:
- Crazy, perhaps, but often with motive
- Touched the engine
- Heads get shock read back
- Barmy (colloq)
- Crackers - or what they're required for?
- Engine (abbrev.)
- Look firm - but is mad!
- Stagger back getting unbalanced
- See 12 Across
- Teachers' union's for heads
- Bats getting a century, a half-century and two ducks possibly
- Crazy, being seen in daze going around
- 4 things to eat
- Out to lunch (may contain these?)
- Upsetting shock makes one crazy