Went mad to possess property in Milton Keynes, say (3,4)
I believe the answer is:
new town
'property in milton keynes say' is the definition.
I can't judge whether this defines the answer.
'went mad to possess' is the wordplay.
'mad' indicates an anagram.
'to possess' becomes 'own' (synonyms).
'went' with letters rearranged gives 'newt'.
'newt'+'own'='NEW TOWN'
Can you help me to learn more?
(Other definitions for new town that I've seen before include "eg Crawley" , "Basildon, perhaps ..." , "Planned settlement to relieve congestion" , "Place for population overspill?" , "urban development" .)