Dude certainly read aloud leaflet (8)
I believe the answer is:
brochure
'leaflet' is the definition.
(I know that leaflet can be written as brochure)
'dude certainly read aloud' is the wordplay.
I cannot quite see how this works, but
'dude' could be 'bro' (both can informally mean a man) and 'bro' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for brochure that I've seen before include "Promotional booklet" , "Pamphlet, leaflet" , "Publicity booklet or pamphlet" , "Prospectus" , "Advertising booklet" .)