GPS suggestion (5)

I think it could be either:

Which length description are you looking for?:

3 5*

'gps suggestion' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for route that I've seen before include "Course followed" , "Course, road" , "Course to be travelled" , "Choice of roads in an itinerary" , "Way, course" .)

I've seen this clue in the King Feature Syndicate, the LA Times, The Mirror and The New York Times.

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