Parrots from city gardens (6)
I believe the answer is:
echoes
'parrots' is the definition.
(I've seen this before)
'city gardens' is the wordplay.
'city' becomes 'ec' (the City of London postcode).
'gardens' becomes 'hoes' (I can't justify this - if you can you should believe this answer much more).
'ec'+'hoes'='ECHOES'
'from' is the link.
Can you help me to learn more?
(Other definitions for echoes that I've seen before include "rings" , "Sounds reverberating" , "Sound reverberations" , "repercussions" , "Reflected sounds" .)