Juicy thing in family house (5,6)
I believe the answer is:
blood orange
'juicy thing' is the definition.
The definition suggests a singular noun which matches the answer.
'family house' is the wordplay.
'family' becomes 'blood' (blood can mean one's family).
'house' becomes 'orange' (Dutch royal house, as in William of Orange).
'blood'+'orange'='BLOOD ORANGE'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for blood orange that I've seen before include "Citrus variety" , "Fruit" .)