Not in time to protect king from violent injury (7)
I believe the answer is:
outrage
'violent injury' is the definition.
'outrage' can be an answer for 'injury' (I have seen 'Gross injury ' mean 'outrage' so perhaps 'injury' could also mean 'outrage'). I'm not certain of the 'violent' bit.
'not in time to protect king' is the wordplay.
'not in' becomes 'out' ('out' is the opposite to 'in').
'time' becomes 'age' (age is a kind of time).
'to protect' indicates putting letters inside.
'king' becomes 'r' (r is abbreviation for rex).
'out'+'age'='outage'
'outage' going around 'r' is 'OUTRAGE'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for outrage that I've seen before include "Atrocious act" , "Gross injury" , "Very angry reaction" , "Extreme indignation" , "scandalous!" .)