Blue Mountains sight for the Bronte family, perhaps (3,5,7)
I believe the answer is:
the three sisters
'blue mountains sight' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'the bronte family perhaps' is the wordplay.
I cannot really see how this works, but
an anagram of 'the' is 'het' which is present in the answer.
The remaining letters 'threesisters' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for the three sisters that I've seen before include "Chekhov's" , "Graces?" , "Play" , "girls in treacle well" .)