Finished entering every other address for herdsmen (7)
I believe the answer is:
drovers
'herdsmen' is the definition.
('drover' can be a synonym of 'herdsman')
'finished entering every other address' is the wordplay.
'finished' becomes 'over' (similar in meaning).
'entering' means one lot of letters goes inside another.
'every other' indicates alternate letters.
The alternating letters of 'address' are 'drs'.
'over' put within 'drs' is 'DROVERS'.
'for' is the link.
(Other definitions for drovers that I've seen before include "herdsmen" , "Herders" .)