Rebellion at the top reported in verse? (5)
I believe the answer is:
haiku
'verse?' is the definition.
(thesaurus)
'rebellion at the top reported' is the wordplay.
I cannot quite see how this works, but
'top' could be 'ai' (I've seen this in other clues) and 'ai' is found in the answer.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for haiku that I've seen before include "Japanese verse form of three short lines" , "Japanese three-line poem of 17 syllables" , "Seventeen-syllable Japanese poem" , "Eastern poetry" , "Type of Japanese poem" .)