Twisted characters cause injury (5)
I believe the answer is:
wound
This might be a double definition.
'twisted characters cause' is the first definition.
'wound' can be an answer for 'twisted' (I've seen this in another clue). I am not sure about the 'characters cause' bit.
'injury' is the second definition.
(I know that injury can be written as wound)
Can you help me to learn more?
(Other definitions for wound that I've seen before include "Turned about" , "Injury to living tissue" , "injury to reputation" , "Slight injury" , "Went round" .)