Most of close action destroyed breaker of images (10)
I believe the answer is:
iconoclast
'breaker of images' is the definition.
(someone destroying symbolic things)
'most of close action destroyed' is the wordplay.
'most of' means to remove the last letter.
'destroyed' indicates anagramming the letters.
'close' with its final letter taken off is 'clos'.
'clos'+'action'='closaction'
'closaction' anagrammed gives 'ICONOCLAST'.
(Other definitions for iconoclast that I've seen before include "A dissident" , "Debunker of reputations" , "Challenging type" , "Unorthodox thinker" , "heretic" .)