Feeling of nationwide anguish (4)

I believe the answer is:

idea

'feeling' is the definition.
(thesaurus)

'of nationwide anguish' is the wordplay.
'of' indicates the answer is hidden within the clue.
'IDEA' is hidden in the letters of 'nationwide anguish'.

(Other definitions for idea that I've seen before include "Fancy" , "Brainwave" , "Notion, concept" , "Intention" , "Proposal" .)

I've seen this clue in The Telegraph.

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