### Clue: Rowing thus to have begun,Off went the Olympic gun (7,7)
### Answer: RHYMING COUPLET 
 ### Explanation: Definition: Rowing thus to have begun,Off went the Olympic gun
 Cryptic defn: The description of the 2 lines "…. begun" and "….gun" which rhyme. Except for providing the surface, I can't tell if the words themselves contribute any more to the answer. There's also no space between "begun," and "Off" in the online version, though the capital letter signifies a new line, as in a verse.