Crossword Genius

You are silly backing socialist (6)

Ross

I believe the answer is:

reader

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'you' is the definition.
(I've seen this before)

'silly backing socialist' is the wordplay.
'silly' becomes 'rea' (I can't justify this - if you can you should believe this answer much more).
'backing' is a reversal indicator.
'socialist' becomes 'red' (red can informally mean a socialist).
'red' in reverse letter order is 'der'.
'rea'+'der'='READER'

'are' acts as a link.

Can you help me to learn more?

(Other definitions for reader that I've seen before include "One who studies - or his book" , "See 15" , "University lecturer - text book" , "Learning book" , "One perusing book" .)

I've seen this clue in The Sun.
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