Zodiac constellation (3)
I believe the answer is:
leo
'zodiac constellation' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for leo that I've seen before include "Singer-songwriter Sayer, b. 1949" , "Lion sign of the Zodiac" , "A constellation; several popes" , "Horoscope sign" , "Fifth sign of the zodiac" .)