Blasphemy from goatherd (4)
I believe the answer is:
oath
'blasphemy' is the definition.
(I've seen this before)
'from goatherd' is the wordplay.
'from' indicates the answer is hidden within the clue.
'OATH' can be found hidden inside 'goatherd'.
(Other definitions for oath that I've seen before include "swearing" , "A curse or a vow" , "Swear word" , "Solemn promise to tell the truth or be loyal" , "Curse or solemn promise" .)