This is the 13952nd most frequent German word.
früherer
"Former" or "earlier."
Here, 'früherer' is used as an attributive adjective describing 'Schüler'. It indicates that Peter was a student of mine in the past, but currently is not.
Peter ist ein früherer Schüler von mir.
Peter is a former student of mine.
In this case, 'früherer' modifies 'Zugang', signifying that the access occurs prior to the standard time, specifically for VIP attendees.
Früherer Zugang zum Konzert ist nur mit VIP-Tickets möglich.
Earlier access to the concert is only possible with VIP tickets.
The word 'früherer' qualifies 'Werke', suggesting that this album belongs to works created earlier in the artist's career or timeline.