Planet’s way out (4)

I believe the answer is:

lane

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'planet's way out' is the definition.
I can't judge whether this defines the answer.

'planet's way out' is the wordplay.
'out' indicates the answer is hidden within the clue (I've seen 'out of' mean this).
'LANE' can be found hidden inside 'planets way'.

Can you help me to learn more?

(Other definitions for lane that I've seen before include "Minor road" , "Subdivision of road for traffic" , "Narrow street" , "Footpath" , "Narrow country road" .)

I've seen this clue in The Mirror.

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