Notice present - a book - has a fan (8)
I believe the answer is:
adherent
'a fan' is the definition.
(I've seen this before)
'notice present a book' is the wordplay.
'notice' becomes 'ad' (both can mean an advertisement).
'present' becomes 'here' (both can mean in attendance).
'a book' becomes 'nt' (New Testament).
'ad'+'here'+'nt'='ADHERENT'
'has' acts as a link.
(Other definitions for adherent that I've seen before include "Supporter; sticking" , "Disciple, follower" , "Weep" , "advocate" , "Staunch follower" .)