Limerick or sonnet (4)
I believe the answer is:
poem
This clue is a double definition.
'limerick' is the first definition.
(I've seen this in another clue)
'sonnet' is the second definition.
(I've seen this in another clue)
(Other definitions for poem that I've seen before include "Ode" , "Piece of verse" , "Mope about in verse" , "Verse form" , "Literary composition, sometimes in verse" .)