It's often broken in Los Angeles West (3)
I believe the answer is:
law
'it's often broken' is the definition.
(I've seen this in another clue)
'los angeles west' is the wordplay.
'los angeles' becomes 'LA' (abbreviation).
'west' becomes 'W' (abbreviation).
'la'+'w'='LAW'
'in' is the link.
(Other definitions for law that I've seen before include "at 16 down [MAN UNITED]" , "Collection of rules imposed by authority" , "'Possession is nine points of the ...'" , "Legislation" , "Set of rules laid down by authority" .)