Swamp creature in microcosm (4)

I believe the answer is:

croc

'swamp creature' is the definition.
(short for crocodile)

'in microcosm' is the wordplay.
'in' indicates a hidden word.
'CROC' is hidden within 'microcosm'.

(Other definitions for croc that I've seen before include "Small animal" , "Single-handed mariner's nemesis" , "creature heard to be a vicious one" , "that might be sitting on your foot" , "Wild animal" .)

I've seen this clue in The Sun.

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