Well-equipped place for caravans en route (5)

I believe the answer is:

oasis

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'well' is the definition.
(source of water)

I can't explain the rest of the clue.

(Other definitions for oasis that I've seen before include "Green area in desert" , "beauty spot" , "Fertile patch in a desert" , "Place of refreshment" , "Fertile spot in desert" .)

I've seen this clue in The Globe and Mail.

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