The Scales, in the zodiac (5)
I believe the answer is:
libra
I believe this clue is a double definition.
'the scales' is the first definition.
(I've seen this before)
'in the zodiac' is the second definition.
('Libra' is part of 'zodiac')
(Other definitions for libra that I've seen before include "Constellation near Virgo" , "Balance constellation" , "Old pound" , "Someone born between September 23 and October 22" , "Scales constellation" .)