I am about to make initial wound (4)
I believe the answer is:
maim
'wound' is the definition.
(I've seen this before)
'i am about to make initial' is the wordplay.
'about' says the letters should be written backwards.
'to' is a charade indicator (letters next to each other).
'initial' indicates taking the first letters.
The initial letter of 'make' is 'm'.
'i'+'am'='iam'
'iam' reversed gives 'mai'.
'mai'+'m'='MAIM'
(Other definitions for maim that I've seen before include "Injure seriously, leaving permanent damage" , "Severely damage" , "Injure and cripple" , "Injure (a person), causing permanent disability" , "Hurt badly" .)