Sign before Virgo (3)
I believe the answer is:
leo
'sign before virgo' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for leo that I've seen before include "house" , "Zodiacal lion" , "Lion sign of the Zodiac" , "born in July or August" , "Cancer, ___, Virgo" .)