Live out on new development (9)
I believe the answer is:
evolution
'development' is the definition.
(I know that development can be written as evolution)
'live out on new' is the wordplay.
'new' is an anagram indicator.
'live'+'out'+'on'='liveouton'
'liveouton' anagrammed gives 'EVOLUTION'.
(Other definitions for evolution that I've seen before include "Gradual change" , "Slow change" , "Darwinian process" , "Development - progress" , "Darwinian theory" .)