Related Clues:

• Very difficult
• Tricky sort of behaviour you'd expect from 26 across
• Pretty girl outside, wicked inside: diabolical
• Wicked food full of badness
• Atrocious food, poisonous inside
• Good-looking woman -- inside is wicked, very wicked
• Wicked stunner with wicked heart
• Unreported evil is horrible -- what's covered up is very bad
• Diabolical food with noxious filling
• Very sinful, like a spicy meal?
• He's livid, agitated yet mischievous
• Take lead from 15 across - it is hot and the sort of behaviour you'd expect from 26 across
• Diabolical meal causing misfortune inside
• Satanic underworld god welcomes wicked husband
• Opening 15 across is initially hardly diabolical