Lines of dialogue between human and pigeon recorded (5)
I believe the answer is:
haiku
'lines' is the definition.
(type of three-line Japanese poem)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for haiku that I've seen before include "Jap 17 syllable poem" , "Japanese 3-line poem of 17 syllables" , "Pithy lines" , "Japanese three-line poem of 17 syllables" , "Japanese verse form of three short lines" .)