Record one book as a typical example (7)
I believe the answer is:
epitome
'a typical example' is the definition.
(I've seen this before)
'record one book' is the wordplay.
'record' becomes 'EP' (abbreviation for extended play record).
'one' becomes 'i' (Roman numeral).
'book' becomes 'tome' (a tome is a book).
'ep'+'i'+'tome'='EPITOME'
'as' acts as a link.
(Other definitions for epitome that I've seen before include "Summary of a written work" , "Typical example, prototype" , "Ideal example" , "Exemplar - embodiment" , "Digest" .)