Novel variety of energy: gas (5,4)

I believe the answer is:

agnes grey

'novel' is the definition.
(novel by Anne Bronte)

'variety of energy gas' is the wordplay.
'variety of' is an anagram indicator.
'energy'+'gas'='energygas'
'energygas' anagrammed gives 'AGNES GREY'.

(Other definitions for agnes grey that I've seen before include "Novel" , "Acton governess" .)

I've seen this clue in The Times.

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