Rhyme (4)
'rhyme' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for poem that I've seen before include "Verse form" , "Mope about in verse" , "Eg, If-" , "Ode" , "Piece of verse" .)
'rhyme' is the definition.
(I know that limerick is a type of rhyme)
This is the entire clue.
(Other definitions for limerick that I've seen before include "Rhyme" , "Irish county's produced" , "Humorous five-line verse" , "Humorous verse form" , "City of humorous verse" .)