Utterly full of ore that's terrible (5)

I believe the answer is:

awful

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'terrible' is the definition.
(I know that terrible can be written as awful)

I cannot understand how the remainder of the clue works.

(Other definitions for awful that I've seen before include "The pits" , "Disgusting" , "Exceptionally bad" , "gruesome!" , "Not good at all" .)

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

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