Horror -- is one stuck in road in Dartmoor? (10)

I believe the answer is:

imprisoned

I'm a little stuck... Click here to teach me more about this clue!

'horror is one stuck in road in dartmoor?' is the definition.
I can't tell whether this defines the answer.

'horror is one stuck in road in' is the wordplay.
'horror' becomes 'imp' (I am not sure about this - if you are sure you should believe this answer much more).
'stuck in' means one lot of letters goes inside another.
'road' becomes 'rd' (abbreviation).
'in' indicates putting letters inside.
'one' put inside 'rd' is 'roned'.
'is' inserted into 'roned' is 'risoned'.
'imp'+'risoned'='IMPRISONED'

Can you help me to learn more?

(Other definitions for imprisoned that I've seen before include "Put away" , "in jail" , "behind bars" , "Locked up" .)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.