City investment? (5)
I believe the answer is:
siege
This clue might be a double definition.
'city' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'investment' is the second definition.
(investment can mean a siege)
Can you help me to learn more?
(Other definitions for siege that I've seen before include "Military operation to seal off (town)" , "Blockade of a town or fortress" , "Persistent attack" , "Military operation surrounding a town" , "seat" .)