Hurry back, then walk somewhere far off (4,5)

I believe the answer is:

deep space

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

'somewhere far off' is the definition.
I can't tell whether this definition defines the answer.

'hurry back then walk' is the wordplay.
'hurry' becomes 'speed' ('speed' can be a synonym of 'hurry').
'back' says the letters should be written backwards.
'then walk' becomes 'pace' (pacing is a kind of walking. I am not sure about the 'then' bit.**).
'speed' back-to-front is 'deeps'.
'deeps'+'pace'='DEEP SPACE'

Can you help me to learn more?

(Other definitions for deep space that I've seen before include "even devoid of 12 [THIN AIR]" , "void" , "Region beyond our atmosphere" .)

I've seen this clue in The Independent.

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.