Report of plant garden in London area (4)
I believe the answer is:
soho
'london area' is the definition.
(I've seen this before)
'report of plant garden' is the wordplay.
'report of' indicates a 'sounds like' (homophone) clue.
'plant' becomes 'sow'.
'garden' becomes 'ho' (I can't justify this - if you can you should give a lot more credence to this answer).
'sow' is a homophone of 'so'.
'so'+'ho'='SOHO'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for soho that I've seen before include "Colourful show-biz area of West End London" , "W London area" , "(Formerly) disreputable area of London" , "District of London, noted for restaurants and nightclubs" , "Theatre and night-life district of London" .)