Vesta's equal? (5)
I believe the answer is:
match
I believe this clue is a double definition.
'vesta's' is the first definition.
(thesaurus)
'equal?' is the second definition.
(matching is a kind of equaling)
(Other definitions for match that I've seen before include "Stick in a box?" , "Tally; game" , "Marriage; game" , "Light" , "tie" .)