A 1986 sci-fi film directed by James Cameron (6)

I believe the answer is:

aliens

(Other definitions for aliens that I've seen before include "Foreigners or extraterrestrials" , "Forms of life assumed to exist outside Earth" , "Outer space creatures, perhaps from Mars?" , "Strange forms of life" , "Foreigners or creatures from outer space" .)

I've seen this clue in The Independent.

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