First person in record book for example (7)
I believe the answer is:
epitome
'example' is the definition.
(epitome is a kind of example)
'first person in record book' is the wordplay.
'first person' becomes 'i'.
'in' means one lot of letters goes inside another.
'record' becomes 'ep'.
'book' becomes 'tome' (a tome is a book).
'ep'+'tome'='eptome'
'i' placed into 'eptome' is 'EPITOME'.
'for' acts as a link.
(Other definitions for epitome that I've seen before include "ie Tempo (anag.)" , "Archetype, typical example" , "Paradigm" , "Typical example, prototype" , "Abstract" .)