Reported looks of a chronicler of his age (5)
I believe the answer is:
pepys
'a chronicler of his age' is the definition.
(17th-century diarist Samuel Pepys)
'reported looks' is the wordplay.
'reported' indicates a 'sounds like' (homophone) clue.
'looks' becomes 'peeps' (peeping is a kind of looking).
'peeps' is a homophone of 'PEPYS'.
'of' is the link.
(Other definitions for pepys that I've seen before include "Samuel -, noted diarist" , "Old writer" , "Journalist" , "English diarist and naval administrator, d. 1703" , "Samuel, diarist, d. 1703" .)