Far into region, on uphill journey — car slower? (5,4)
I believe the answer is:
speed trap
'far into' is the definition.
I can't judge whether this defines the answer.
'region on uphill journey car slower?' is the wordplay.
I cannot quite understand how this works, but
'region' could be 'e' (E region is an example) and 'e' is present in the answer.
'car' could be 'trap' (horse-drawn carriage) and 'trap' is present in the answer.
The remaining letters 'sped' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for speed trap that I've seen before include "inconvenience for boy racers?" , "road safety measure" , "Where you may see police" , "that slows motorist?" , "Police control" .)