Marsupial doing nasty things to obtain cod (9)

I believe the answer is:

bandicoot

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'marsupial' is the definition.
(I know that bandicoot is a type of marsupial)

'doing nasty things to obtain cod' is the wordplay.
'obtain cod' can be anagrammed to 'BANDICOOT'.
But, I am not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for bandicoot that I've seen before include "Aussie native" , "Australian marsupial with long pointed muzzle and tail" , "Australian native" , "Little animal" , "rat is seen" .)

I've seen this clue in The Independent.

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