Run away from raid after youth initially displays thuggishness (7)
I believe the answer is:
yobbery
'thuggishness' is the definition.
(thuggish behaviour)
'run away from raid after youth initially' is the wordplay.
'run' becomes 'r' (cricket abbreviation).
'away from' is a deletion indicator.
'raid' becomes 'robbery' (a raid is a robbery).
'after youth' becomes 'y' (I am not sure about the 'after' bit.).
'initially' means one lot of letters go next to another.
'robbery' with 'r' taken away is 'obbery'.
'obbery' put after 'y' is 'YOBBERY'.
'displays' acts as a link.
(Other definitions for yobbery that I've seen before include "Loutishness" , "Beer-fuelled behaviour" , "Inclination to act loutishly" , "Loutish behaviour" , "antisocial behaviour" .)