### Clue: Some lines about Drugs Enforcement Agency in sport (7)
### Answer: RONDEAU 
 ### Explanation: Definition: Some lines
 [ ON(about, as in "the lecture was on your favourite subject") + D.E.A.(abbrev. for the Drug Enforcement Agency) ] **contained in**(in) RU(abbrev. for the sport of Rugby Union).
Answer: A poem of 13 or 10 lines, and other poetic characteristics.