Father sounds like one moaning aloud (4)
I believe the answer is:
sire
'father' is the definition.
(synonyms)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for sire that I've seen before include "Rise for male parent (4)." , "Ancestor" , "Make children" , "Stallion; beget" , "Male parent of, say, horse" .)