Abruptly come to agreement to put circular item in portable storage (7,4)
I believe the answer is:
compact disc
'abruptly come' is the definition.
I can't judge whether this defines the answer.
'agreement to put circular item in portable storage' is the wordplay.
'agreement' becomes 'compact' (compact can mean an agreement).
'to put' is a charade indicator (letters next to each other).
'circular item in portable storage' becomes 'disc' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'compact'+'disc'='COMPACT DISC'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for compact disc that I've seen before include "Means of recording sound" , "Music medium" , "Digital record" .)