Overseer is pro name change (7)
I believe the answer is:
foreman
'overseer' is the definition.
(thesaurus)
'pro name change' is the wordplay.
'pro' becomes 'for' (I've seen this before**).
'change' indicates an anagram.
'name' with letters rearranged gives 'eman'.
'for'+'eman'='FOREMAN'
'is' acts as a link.
(Other definitions for foreman that I've seen before include "Gaffer, boss" , "Supervising worker" , "Charge hand" , "Fellow in charge" , "Male supervisor" .)