Flat place of arrival in small field (7)
I believe the answer is:
paddock
'small field' is the definition.
(I've seen this before)
'flat place of arrival' is the wordplay.
'flat' becomes 'pad' (a person's home).
'place of arrival' becomes 'dock' (I am not sure about this - if you are sure you should believe this answer much more).
'pad'+'dock'='PADDOCK'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for paddock that I've seen before include "Small field for horses" , "Enclosure at racetrack for horses" , "enclosed field" , "Where horses are paraded before a race" , "Pen for racehorses" .)