Nature etc destroyed, it's said (9)
I believe the answer is:
utterance
'it's said' is the definition.
(an utterance is something which is said)
'nature etc destroyed' is the wordplay.
'destroyed' indicates an anagram.
'nature'+'etc'='natureetc'
'natureetc' anagrammed gives 'UTTERANCE'.
(Other definitions for utterance that I've seen before include "Vocal expression" , "one's said" , "sermon, say" , "Word" , "Expression in speech" .)