Uncover Blue River island figure revered along the Nile (6)
I believe the answer is:
anubis
'figure revered along the nile' is the definition.
I can't judge whether this definition defines the answer.
'uncover blue river island' is the wordplay.
'uncover' indicates the central letters (I've seen 'uncovered' mean this).
'blue' becomes 'sad' (similar in meaning).
'river' becomes 'nub' (I can't justify this - if you can you should believe this answer much more).
'island' becomes 'is' (geographical abbreviation).
The middle letter of 'sad' is 'a'.
'a'+'nub'+'is'='ANUBIS'
Can you help me to learn more?
(Other definitions for anubis that I've seen before include "Egyptian god - in a bus (anag)" , "Is a bun about the ancient Egyptian god of the dead" , "Egyptian jackal-headed god" , "one Egyptians thought great" , "Egypt. jackal-headed god" .)