Redgrave disguised as Evans? (7)

I believe the answer is:

vanessa

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'redgrave' is the definition.
Both the definition and answer are singular nouns.
Maybe there's an association between them I don't understand?

'disguised as evans?' is the wordplay.
'disguised' indicates an anagram.
'as'+'evans'='asevans'
'asevans' anagrammed gives 'VANESSA'.

Can you help me to learn more?

(Other definitions for vanessa that I've seen before include "Red admiral butterfly" , "Girl's name; red admiral, painted lady genus" , "Girl's name - butterfly genus" .)

I've seen this clue in the Best For Puzzles.

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