One with no respect for environment butchered big turtle (9)

I believe the answer is:

litterbug

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'one with no respect for environment' is the definition.
I can't judge whether this definition defines the answer.

'butchered big turtle' is the wordplay.
'butchered' indicates an anagram (I've seen 'butcher' mean this).
'big'+'turtle'='bigturtle'
'bigturtle' anagrammed gives 'LITTERBUG'.

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(Other definitions for litterbug that I've seen before include "Wrapper dropper?" , "Person who drops rubbish in a public place" , "Person dropping refuse in public places" , "Bad citizen" , "Trash dropper" .)

I've seen this clue in The Independent.

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