Shatter inside target, perhaps (12)
I believe the answer is:
disintegrate
'shatter' is the definition.
(I've seen this before)
'inside target perhaps' is the wordplay.
'perhaps' indicates an anagram.
'inside'+'target'='insidetarget'
'insidetarget' anagrammed gives 'DISINTEGRATE'.
(Other definitions for disintegrate that I've seen before include "Lose all cohesion" , "Break into little pieces" , "Crumble" , "Smash" , "collapse" .)