In a manner of speaking, a delivery of wild sheep to go around castle (6)
I believe the answer is:
speech
'in a manner of speaking a delivery' is the definition.
I can't judge whether this definition defines the answer.
'wild sheep to go around castle' is the wordplay.
'wild' indicates anagramming the letters.
'to go around' is an insertion indicator.
'castle' becomes 'c' (this could be a standard abbreviation which I don't know about).
'sheep' with letters rearranged gives 'speeh'.
'speeh' placed around 'c' is 'SPEECH'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for speech that I've seen before include "Formal address or discourse" , "Vocal communication" , "Oral form of communication" , "Oration, address" , "Giving address" .)