Promotional material from Britpop band opening for Beyoncé (5)
I believe the answer is:
blurb
'promotional material' is the definition.
(blurb is a kind of promotional material)
'britpop band opening for beyonce' is the wordplay.
'britpop band' becomes 'Blur' (band in Britpop genre).
'opening for' says to take the initial letters.
The first letter of 'beyonce' is 'b'.
'blur'+'b'='BLURB'
'from' is the link.
(Other definitions for blurb that I've seen before include "Promotional statement on a book's dust jacket" , "Advertising spiel" , "Enticing paragraph" , "A book's puff" , "Publisher's puff" .)