She's established in the V and A (5)
I believe the answer is:
vesta
'she's' is the definition.
Both the answer and definition are singular nouns.
Maybe there's an association between them I don't understand?
'established in the v and a' is the wordplay.
'established' becomes 'est' (abbreviation).
'in the' is an insertion indicator.
'and' is a charade indicator (letters next to each other).
'v'+'a'='va'
'est' placed inside 'va' is 'VESTA'.
Can you help me to learn more?
(Other definitions for vesta that I've seen before include "Asteroid; goddess; match" , "Hearth goddess; a match" , "Stave (anag.)" , "Roman goddess; match" , "heavenly body" .)