Soft sound from farm shed (3)
I believe the answer is:
low
'soft' is the definition.
(similar in meaning)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for low that I've seen before include "something from Guernsey?" , "Inferior; moo" , "Moo; not high" , "Deep sound made by cattle" , "Inferior; not loud" .)