Opinion given on ragged material encapsulating hard musical group (4,4)
I believe the answer is:
take that
'musical group' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'opinion given on ragged material encapsulating hard' is the wordplay.
'opinion' becomes 'take' (I've seen this in another clue).
'given on ragged material' becomes 'tat' (I can't justify this - if you can you should believe this answer much more).
'encapsulating' means one lot of letters goes inside another (I've seen this in other clues).
'hard' becomes 'h' (abbreviation used in pencil classifications).
'tat' going around 'h' is 'that'.
'take'+'that'='TAKE THAT'
Can you help me to learn more?
(Another definition for take that that I've seen is " pop group".)