Abandon group playing what should be popular song (4,5)
I believe the answer is:
cast aside
'abandon' is the definition.
(I've seen this in another clue)
'group playing what should be popular song' is the wordplay.
I cannot quite understand how this works, but
'playing' could be 'as' (I've seen this in other clues) and 'as' is found in the answer.
'song' could be 'aside' (A-side on a record) and 'aside' is present in the answer.
The remaining letters 'ct' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for cast aside that I've seen before include "Get rid of" , "Ditch" , "dropped" .)