### Clue: Eventually or from time to time (3,3)
### Answer: ONE DAY 
 ### Explanation: Definition: Eventually ,from time to time 
 Double defn: 1st: As in "one day, they'll see the light", and 2nd: I'm not sure of this: I think it refers to an unspecified time, though this sense is close to that of the 1st defn.