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 tell whether this definition defines the answer.
'uncover blue river island' is the wordplay.
'uncover' means to look at the middle letters (I've seen 'uncovering' mean this).
'blue' becomes 'sad' (similar in meaning).
'river' becomes 'nub' (I can't justify this - if you can you should give a lot more credence to this answer).
'island' becomes 'is' (abbreviation).
The centre 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" .)