Clue: Blunt answer's received about legislative measure (5,10)
Answer: JOINT RESOLUTION
Explanation: Definition: legislative measure
 [ JOINT(slang for a cannabis cigarette, like a blunt which is an amount of cannabis rolled with cigar wrapping) + SOLUTION(answer to a problem) ] **containing**(received) RE(with reference to/about).
Defn: … in the US Congress.