Address takes in Assange, initially, giving relief to leakers (6)
I believe the answer is:
'relief to leakers' is the definition.
I can't judge whether this defines the answer.
'address takes in assange initially' is the wordplay.
'address' becomes 'url' (I can't justify this - if you can you should believe this answer much more).
'takes' means one lot of letters goes inside another.
'initially' indicates taking the first letters.
The first letter of 'assange' is 'a'.
'url' enclosing 'ina' is 'URINAL'.
'giving' is the link.
Can you help me to learn more?
(Other definitions for urinal that I've seen before include "public convenience" , "Sanitary fitting" , "waste disposal unit" .)