Cherub or bust in publicity booklet (8)
I believe the answer is:
brochure
'publicity booklet' is the definition.
(I've seen this before)
'cherub or bust' is the wordplay.
'bust' indicates anagramming the letters.
'cherub'+'or'='cherubor'
'cherubor' with letters rearranged gives 'BROCHURE'.
'in' is the link.
(Other definitions for brochure that I've seen before include "Pamphlet, leaflet" , "Publicity booklet or pamphlet" , "Advertising booklet" , "Promotional booklet" , "Booklet or pamphlet containing information" .)