Embankment, old and broken (7)
I believe the answer is:
damaged
'broken' is the definition.
(associated in meaning)
'embankment old' is the wordplay.
'embankment' becomes 'dam' (I've seen this before).
'old' becomes 'aged' (similar in meaning).
'dam'+'aged'='DAMAGED'
'and' acts as a link.
(Other definitions for damaged that I've seen before include "Harmed, injured or spoiled" , "Flawed, harmed" , "Sullied or harmed" , "Hurt" , "Marred" .)