A horse without covering bolted wildly — only now turn to this? (6,4)
I believe the answer is:
stable door
'wildly only now turn to this?' is the definition.
The definition suggests a singular noun which matches the answer.
'a horse without covering bolted' is the wordplay.
I cannot quite understand how this works, but
'a' is within the answer.
an anagram of 'bolted' is 'tbledo' which is present in the remaining letters.
The remaining letters 'sor' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for stable door that I've seen is " It's often locked after the horse has bolted".)