Unpleasant metaphor riddled clippings (6)

I believe the answer is:

horrid

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'unpleasant' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?

'metaphor riddled clippings' is the wordplay.
'HORRID' is hidden within the letters.
However, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for horrid that I've seen before include "Unpleasant, not nice" , "Nasty, frightening" , "Appalling" , "Hideous" , "Frightful" .)

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

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