Talent becomes dormant (6)
I believe the answer is:
latent
'dormant' is the definition.
(I've seen this in another clue)
'talent becomes' is the wordplay.
'becomes' indicates anagramming the letters.
'talent' with letters rearranged gives 'LATENT'.
(Other definitions for latent that I've seen before include "Existing but not yet manifest" , "Hidden but able to be developed" , "Hidden, dormant" , "waiting to be discovered" , "Hidden (potential)" .)