Recent development in Morden (6)
I believe the answer is:
modern
'recent' is the definition.
(thesaurus)
'development in morden' is the wordplay.
'morden' can be anagrammed to 'MODERN'.
Though, I'm not sure how this is indicated.
Can you help me to learn more?
(Other definitions for modern that I've seen before include "Present-day" , "Novel" , "The very latest available" , "In history, the period or era since the Middle Ages" , "Recent, up to date" .)