Prophet seen in Judaea, mostly (4)
I believe the answer is:
amos
'prophet' is the definition.
(biblical prophet)
'in judaea mostly' is the wordplay.
'in' indicates a hidden word.
'AMOS' can be found hidden inside 'judaea mostly'.
'seen' acts as a link.
(Other definitions for amos that I've seen before include "Old Testament book" , "man" , "Part of bible" , "Prophet in the Bible" , "Biblical character" .)