Always in one's thoughts? (10)

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2,3,5

telepathic

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'always in' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?

I cannot understand how the remainder of the clue works.

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(Other definitions for telepathic that I've seen before include "Communicating by mind alone" , "Extraordinarily communicative" , "Able to pick up ideas" , "communicating senselessly?" , "Communicating by thought" .)

I've seen this clue in the Evening Standard.

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