3 down
Time
to
study
grooved
rubber
on
a
tyre
(5)
Time to study grooved rubber on a tyre (5)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition is grooved rubber on a tyre — that's the tread you see on a tyre's surface. You get there by taking T (the standard abbreviation for time) and sticking READ (to study) right after it.