### Clue: Contents of a pack including drink — that's ironic, to say the least! (7)
### Answer: LITOTES 
 ### Explanation: Definition: to say the least
  LIES(what comes in a pack) **containing**(including) TOT(a small measure of drink) – I hope I have this right, as I can't quite pin down "ironic". 
Defn: An understatement