### Clue: Avoiding action first under 17,19 by rail, we hear (7,1,4)
### Answer: RUNNING A MILE 
 ### Explanation: Definition: Avoiding action,first under 17,19 by rail, we hear 
Double Defn: 1: The flight response in contrast to fight; and 2nd: Feat achieved under 4 minutes(answer to 17 across, 19 down) by Roger **homophone of**(we hear) "banister"(a rail). Bannister was the first man to do it on this day in 1954.