Some scrutinising wheel track (3)
I believe the answer is:
rut
'wheel track' is the definition.
(I've seen this before)
'some scrutinising' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'RUT' is hidden within 'scrutinising'.
(Other definitions for rut that I've seen before include "It can be frustrating" , "hazard in the road" , "Fixed (and tedious?) course" , "Wheel-made furrow" , "Furrow left by wheel" .)