Paper copy (4)
I believe this clue is a double definition.
'paper' is the first definition.
(many newspapers have 'Echo' in their name)
'copy' is the second definition.
(echo can mean a copy or duplication)
(Other definitions for echo that I've seen before include "Nymph (only able to repeat the last words of others)" , "Repeating of sound" , "Reflected sound" , "Reproduction" , "Reflect sound" .)
(Other definitions for photostat that I've seen before include "Copying machine" , "Reproduced copy" .)