An Abba album's appearance (7)
I believe the answer is:
arrival
'appearance' is the definition.
(to appear can mean to arrive at a particular place)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for arrival that I've seen before include "Act of coming" , "Attainment of destination" , "Appearance (at a place)" , "The reaching of one's destination" , "Someone who's just come" .)