Desert transport arrived at length (5)

I believe the answer is:

camel

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'desert transport' is the definition.
(animal used for transport in a desert)

I can't explain the remainder of the clue.

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(Other definitions for camel that I've seen before include "Saharan carrier" , "Humped creature" , "Cud-chewing mammal of desert regions" , "African carrier" , "Desert transport" .)

I've seen this clue in The Sun and The Times.

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