### Clue: Commanding officer with gallon container turned up for a drink (6)
### Answer: COGNAC 
 ### Explanation: Definition: drink
  CO(*Commanding officer*) +(*with*) G(*gallon*, measure of volume, comes in 2 versions, Imperial and US) + reversal(*turned up*, for a down answer).  Defn:  Alcoholic *drink*, a brandy from grapes, produced in the region around the town of the same name in France.