A Swedish group has poetic scheme for this Lear favourite (8)
I believe the answer is:
limerick
'lear favourite' is the definition.
(verse form associated with Edward Lear)
I don't understand the rest of the clue.
(Other definitions for limerick that I've seen before include "Short amusing verse" , "Irish county and port" , "Five-lined poem" , "port used in Ireland" , "Irish county's produced" .)