Example of first person in record book (7)
I believe the answer is:
epitome
'example' is the definition.
(I know that epitome is a type of example)
'first person in record book' is the wordplay.
'first person' becomes 'I' (first-person pronoun).
'in' indicates putting letters inside.
'record' becomes 'EP' (abbreviation for extended play record).
'book' becomes 'tome' (a tome is a book).
'ep'+'tome'='eptome'
'i' inserted into 'eptome' is 'EPITOME'.
'of' is the link.
(Other definitions for epitome that I've seen before include "Something embodying perfectly a stated quality or idea" , "Ideal example" , "classic example" , "Summary of a written work" , "Digest" .)