Undeveloped (6)
I believe the answer is:
latent
'undeveloped' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for latent that I've seen before include "There but not yet effective" , "Hidden (potential)" , "'Hidden, undeveloped (6)'" , "Potential not realised" , "Hidden (talent)" .)