Good Lord! (5)

I think it could be either:

Which length description are you looking for?:

noble

I believe this is a double definition.

'good' is the first definition.
(thesaurus)

'lord' is the second definition.
(I know that lord can be written as noble)

(Other definitions for noble that I've seen before include "gold coin, now obsolete" , "Impressive in appearance" , "Magnificent old coin" , "Dignified" , "Lord" .)

I've seen this clue in the Irish Times, the Irish Times (Crosaire), The Guardian and the Sydney Morning Herald.

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