Some gang's terrorising out of a feeling of unease (5)
I believe the answer is:
angst
'a feeling of unease' is the definition.
'angst' can be an answer for 'unease' (I have seen 'Philosophical unease ' mean 'angst' so perhaps 'unease' could also mean 'angst'). I am not sure about the 'a feeling of' bit.
'some gang's terrorising out' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'ANGST' is hidden in the letters of 'gangs terrorising out'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for angst that I've seen before include "Profound feeling of anxiety or dread" , "Strong feeling of anxiety/dread" , "Oppressive feeling of worry, guilt" , "Horrible feeling" , "Acute anxiety about oneself" .)