Hidden talent for demolition (6)
I believe the answer is:
latent
'hidden' is the definition.
(thesaurus)
'talent for demolition' is the wordplay.
'for demolition' indicates an anagram (I've seen this in other clues).
'talent' is an anagram of 'LATENT'.
(Other definitions for latent that I've seen before include "Existing but not yet developed, say ability" , "not out in the open" , "Not yet visible or developed" , "Talent (anag)" , "Indiscernible" .)