Lay some false trails (3)

I believe the answer is:

set

'lay' is the definition.
(thesaurus)

'some false trails' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'SET' is hidden within 'false trails'.

(Other definitions for set that I've seen before include "Group; hard" , "Go below the horizon," , "plant" , "Arrange; a party" , "Firm, like jelly" .)

I've seen this clue in The Independent.

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