### Clue: Drink and travel regularly, showing flexibility (6)
### Answer: SUPPLY 
 ### Explanation: Definition: showing flexibility
  SUP(*drink*) + PLY(*travel regularly*, as in "No. 74 bus plies between here and Marble Arch station.").  Defn:  Adverb for supple, alternate to and pronounced same as supplely.  Not to be confused with the word pronounced "sir-ply", cf. 30A.