Joshua's dad and sister fancy pigeon (3)
I believe the answer is:
nun
I believe this clue is a triple definition!
'joshua's dad' is the first definition.
(Nun is a man in the Bible)
'and' acts as a link.
'sister' is the second definition.
(sister is a term of address for a nun)
'fancy pigeon' is the third definition.
(I know that Nun is a type of fancy pigeon)
(Other definitions for nun that I've seen before include "One in holy order" , "eg Carmelite" , "Woman respecting order" , "Member of religious order" , "Woman with a habit" .)