Hmm. Not really an easy question to answer, because astrologists have their own way of talking about the zodiac, etc. However, I don't think they would use
means. I suggest some possibilities:
Virgos are intelligent
A Virgo has intelligence.
Intelligence is influenced by the constellation Virgo.
Intelligence is under the sign of Virgo.
I am out of my depth here-- I don't actually know what a sun sign has to do with a personal quality. All the Virgos I know are rather ditzy.