Top of a job description (5)
I believe the answer is:
title
'top of a job description' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for title that I've seen before include "Form of address - name" , "The name of a work of art or book" , "headline?" , "Lord, sir or doctor, say" , "Name of film, book etc" .)