Prophet of human disaster? (5)
I believe the answer is:
nahum
'prophet' is the definition.
(I've seen this before)
'human disaster?' is the wordplay.
'disaster?' indicates an anagram (I've seen 'disaster' mean this).
'human' is an anagram of 'NAHUM'.
'of' is the link.
(Other definitions for nahum that I've seen before include "Old Hebrew prophet" , "Hebrew prophet - Biblical book" , "Destruction-of-Nineveh prophet" , "Minor prophet" , "Prophet's book" .)