Hebrew prophet regularly seen in farmhouse (4)
I believe the answer is:
amos
'hebrew prophet' is the definition.
(I've seen this before)
'regularly seen in farmhouse' is the wordplay.
'regularly seen in' indicates alternate letters.
The alternating letters of 'farmhouse' are 'AMOS'.
(Other definitions for amos that I've seen before include "Biblical prophet and OT book" , "Old Testament prophet" , "American wild dog" , "Old Testament book" , "man" .)