Crossword Genius

Furrow of truth (3)

Ross

I believe the answer is:

rut

'furrow' is the definition.
(I know that furrow can be written as rut)

'of truth' is the wordplay.
'of' indicates a hidden word.
'RUT' can be found hidden inside 'truth'.

(Other definitions for rut that I've seen before include "Groove worn by wheels" , "It can be frustrating" , "Deep track worn as by wheel" , "Kind of groove or fixed habit" , "have sex!" .)

I've seen this clue in The Mirror.
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