Erect barriers around security device in poor quarter (8)
I believe the answer is:
blockade
'erect barriers around security device in poor quarter' is the definition.
I can't judge whether this definition defines the answer.
'around security device in poor quarter' is the wordplay.
'around' is an insertion indicator.
'security device' becomes 'lock' (I've seen this before).
'in poor' becomes 'bad' (similar in meaning. I am not sure about the 'in' bit.).
'quarter' becomes 'e'.
'lock' going within 'bad' is 'blockad'.
'blockad'+'e'='BLOCKADE'
Can you help me to learn more?
(Other definitions for blockade that I've seen before include "Isolation of place by sea" , "Siege" , "Closure of port to prevent entry or exit" , "Seal off (a place)" , "Cut off" .)