Prone to irrational beliefs (13)

I believe the answer is:

superstitious

(Other definitions for superstitious that I've seen before include "Believing in the supernatural" , "Credulous of omens, etc." , "Disposed to believe in omens" , "Puts out irises (anag)" , "Holding irrational beliefs" .)

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

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