Icy moon of Jupiter (6)
I believe the answer is:
europa
'icy moon of jupiter' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for europa that I've seen before include "old bull-lover?" , "Loved by Zeus" , "Princess who bore Zeus three sons - one of the moons of Jupiter" , "A moon of Jupiter and Greek goddess" , "The mother of King Minos of Crete and a moon of Jupiter" .)