### Clue: C-in-C starts to drink, gets more intoxicated (7)
### Answer: SUPREMO 
 ### Explanation: Definition: C-in-C
  First,*starts* with SUP(*drink*) +(*gets*) anagram(*intoxicated*) of *MORE*
Defn:  *$$C$$*ommander*$$-in-C$$*hief, eg. General Dwight Eisenhower, Supreme Commander, Allied Forces in Europe, and later supreme commander of NATO.