Related Clues:
- Flaw, failing
- Defect, imperfection
- Failing or powerlessness
- Fault or flaw
- Imperfection or blemish
- 'Your area of vulnerability (4,4)'
- There's something wrong underfoot, by the sound of it
- Chip in a dish, e.g
- Strong regulation reveals defect
- Achilles' heel taking some days, say, to find
- Frailty - flaw
- (Make) defect(ive)
- Ill-defended spot - predilection
- One may be fatal
- Logic problem