### Clue: Dessert, alcohol and feasts regularly causing slight corpulence (9)
### Answer: PUDGINESS 
 ### Explanation: Definition: slight corpulence
 PUD(short for pudding,an English term for the Dessert course, whether or not it's a pudding) + GIN( ) + ESS[second, fourth and sixth letters(regularly) of "feasts"]. 
Defn: "slight" might be an understatement here.