Crossword Genius

Driver's guide took a seat and reversed motor home (3,3)

Ross

I believe the answer is:

sat nav

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'driver's guide' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'took a seat and reversed motor home' is the wordplay.
'took a seat' becomes 'sat' (I've seen this before).
'and' means one lot of letters go next to another.
'reversed motor home' becomes 'nav' (I can't explain this - if you can you should believe this answer much more).
'sat'+'nav'='SAT-NAV'

Can you help me to learn more?

(Other definitions for sat nav that I've seen before include "Guidance system" , "Aid" , "Direction-finding equipment" .)

I've seen this clue in the Sydney Morning Herald.
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