My robe redesigned in developmental stage (6)
I believe the answer is:
embryo
'developmental stage' is the definition.
(I've seen this in another clue)
'my robe redesigned' is the wordplay.
'redesigned' indicates anagramming the letters.
'my'+'robe'='myrobe'
'myrobe' with letters rearranged gives 'EMBRYO'.
'in' is the link.
(Other definitions for embryo that I've seen before include "It's potential to grow" , "Issue conceived" , "Baby in womb during first eight weeks" , "Undeveloped organism" , "Child of first eight weeks in womb" .)