Possible Clues:

• Untrustworthy, deceitful
• It's lying by the plate, one's tea, say
• Criminal has to serve one's time
• There's nothing between the plate and where the eggs are to make it so crooked
• Underworld boss put on edge over a good man's lying
• Bent on tucking into lots of food before tea, say
• Spoil one's time, cheating
• Insincere individual's tense on course
• Hedonists turned out to be deceptive
• Unreliable dishes - not properly adjusted