Meaning to get along aimlessly (5)

I believe the answer is:

drift

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'meaning' is the definition.
(drift is a kind of meaning)

I cannot understand how the remainder of the clue works.

(Other definitions for drift that I've seen before include "Go with the flow" , "Implication of what's been said" , "Large heap (of snow)" , "Float with current" , "Snow heaped up by wind" .)

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

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