Some idiot terrified an animal (5)

I believe the answer is:

otter

'animal' is the definition.
(I know that otter is a animal)

'some idiot terrified an' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'OTTER' can be found hidden inside 'idiot terrified an'.

(Other definitions for otter that I've seen before include "Water creature" , "River animal" , "River creature" , "Aquatic carnivore" , "Fish-eater of the weasel family" .)

I've seen this clue in The Sun.

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