### Clue: Veronica went into rocket (9)
### Answer: SPEEDWELL 
 ### Explanation: Definition: Veronica
 ~~Cryptic defn: To go rapidly;to rocket like, well, a rocket, that can cryptically be described as to "speed well".~~ Edit. note:  Thanks to Kairos for the intended parsing:  PEED(went, in the rest room) ***contained in***( into ) SWELL(to rocket;to increase a lot and quickly).
Answer: Another name for the flowering plant, Veronica.