Check out former lover in Hastings region? (6)

I believe the answer is:

sussex

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'region?' is the definition.
(I know that Sussex is a region)

I can't explain the rest of the clue.

(Other definitions for sussex that I've seen before include "East or West county of England" , "Old county of S. England" , "County cricket club" , "fowl" , "County (maybe speckled)" .)

I've seen this clue in The Sun.

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