Chase renegade, inwardly calm (6)

I believe the answer is:
serene
'calm' is the definition.
(synonyms)
'chase renegade inwardly' is the wordplay.
'SERENE' is hidden within the letters.
However, I am unsure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for serene that I've seen before include "Not agitated" , "Calm and unclouded" , "Totally unagitated" , "Calm and at peace" , "without any trouble" .)
