Healing technique is concerning with current flayed skin (5)
I believe the answer is:
reiki
'healing technique' is the definition.
(I've seen this before)
'concerning with current flayed skin' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'with' is a charade indicator (letters next to each other).
'current' becomes 'I' (symbol for electric current).
'flayed' indicates the central letters (to flay something is to take its skin off).
The central letters of 'skin' are 'ki'.
're'+'i'+'ki'='REIKI'
'is' acts as a link.
(Other definitions for reiki that I've seen before include "Japanese massage" , "Hands-on treatment" , "therapy" , "Energy healing technique" , "Energy-channelling healing technique" .)