Where you'll find a horse bleats dreadfully! (6)
I believe the answer is:
stable
'where you'll find a horse' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'bleats dreadfully' is the wordplay.
'dreadfully' indicates an anagram (a dreadful spelling).
'bleats' with letters rearranged gives 'STABLE'.
Can you help me to learn more?
(Other definitions for stable that I've seen before include "Steady place for a horse?" , "Firmly-fixed; building" , "far from bats?" , "Fixed; stud building" , "farm building" .)