Cargo in complex is all natural (7)

I believe the answer is:

organic

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'all natural' is the definition.
'organic' can be an answer for 'natural' ('organic' can be similar in meaning to 'natural'). I am not certain of the 'all' bit.

'cargo in complex' is the wordplay.
'complex' indicates anagramming the letters.
'cargo'+'in'='cargoin'
'cargoin' anagrammed gives 'ORGANIC'.

'is' is the link.

Can you help me to learn more?

(Other definitions for organic that I've seen before include "Made from living matter" , "with carbon involved" , "Relating to living matter" , "Chemical and GM free" , "sort of farming" .)

I've seen this clue in the Irish Times.

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