Development stage not normally launched into (9)
I believe the answer is:
gestation
'development' is the definition.
(I've seen this before)
'stage not normally launched into' is the wordplay.
'not normally' is an anagram indicator.
'launched' indicates anagramming the letters.
'stage' is an anagram of 'gesta'.
'into' anagrammed gives 'tion'.
'gesta'+'tion'='GESTATION'
(Other definitions for gestation that I've seen before include "Development over time" , "Development of plan" , "Period of development" , "as before being transported by coach" , "Development (in womb)" .)