Wind once again concerning with sharp blow (6)
I believe the answer is:
rewrap
'wind once again' is the definition.
The answer and definition are not the same part of speech.
'concerning with sharp blow' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'with' becomes 'w' (short for with).
'sharp blow' becomes 'rap' (rap can mean a sharp hit or blow).
're'+'w'+'rap'='REWRAP'
Can you help me to learn more?
(Other definitions for rewrap that I've seen before include "Again parcel" , "Again cover in paper" .)