Attendant and artist in exciting book (4-6)
I believe the answer is:
page-turner
'exciting book' is the definition.
(I've seen this before)
'attendant and artist' is the wordplay.
'attendant' becomes 'page' (page is a kind of attendant).
'and' says to put letters next to each other.
'artist' becomes 'turner' (painter JMW Turner).
'page'+'turner'='PAGE-TURNER'
'in' is the link.
(Other definitions for page-turner that I've seen before include "exciting book" , "'Unputdownable' book" , "Gripping book" , "Book one can't put down" .)