Amphibious vehicle trapped in stream traced (6)

I believe the answer is:

amtrac

'amphibious vehicle' is the definition.
(I've seen this in another clue)

'trapped in stream traced' is the wordplay.
'trapped in' says the answer is hidden in the clue.
'AMTRAC' can be found hidden inside 'stream traced'.

I've seen this clue in The Times.

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