Songwriters using enclosed rhyme scheme (4)
I believe the answer is:
abba
'enclosed rhyme scheme' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for abba that I've seen before include "Swedish artists" , "camel-hair coat" , "Biblical pop" , "6 24 113 [SCAN-DIN-AVIAN] band" , "Biblical father" .)