Body kept inside bank (4)

I believe the answer is:

dyke

'bank' is the definition.

'body kept inside' is the wordplay.
'inside' indicates a hidden word.
'DYKE' is hidden within 'body kept'.

(Other definitions for dyke that I've seen before include "Anti-flood ditch/wall" , "Flood embankment" , "defensive wall" , "Offa's barrier?" , "Embankment built to prevent flooding as in Holland" .)

I've seen this clue in the Sydney Morning Herald.

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