Neglected Saturn, say, because of interest by Newton (11)

I believe the answer is:

godforsaken

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

'saturn say because of interest by newton' is the wordplay.
'saturn say' becomes 'god' (saturn is a kind of god).
'because of' becomes 'for' ('for' can mean 'because').
'interest' becomes 'sake' (synonyms).
'by' is a charade indicator (letters next to each other).
'newton' becomes 'N' (symbol for the scientific unit of force).
'god'+'for'+'sake'+'n'='GODFORSAKEN'

Can you help me to learn more?

(Other definitions for godforsaken that I've seen before include "Forlorn" , "Lacking any merit or attraction" .)

I've seen this clue in The Times.

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