Provider, wasting energy once, recycles paper the wrong way (6)
I believe the answer is:
issuer
'provider wasting energy' is the definition.
I can't tell whether this definition defines the answer.
'recycles paper the wrong way' is the wordplay.
'recycles' becomes 'reuss' (I can't justify this - if you can you should believe this answer much more).
'paper' becomes 'i' (the i is a UK newspaper).
'the wrong way' says the letters should be written in reverse.
'reuss'+'i'='reussi'
'reussi' written backwards gives 'ISSUER'.
'once' is the link.
Can you help me to learn more?
(Other definitions for issuer that I've seen before include "publishing house?" , "one responsible for 12D [PUBLICATION] ?" , "publisher" , "One distributing for use" .)