Crossword Genius

Manchester community copper's protecting current wine book -- it's sacred (14)

Ross

I believe the answer is:

ecclesiasticus

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'book it's sacred' is the definition.
I can't judge whether this definition defines the answer.

'manchester community copper's protecting current wine' is the wordplay.
'manchester community' becomes 'eccles' (I am not sure about this - if you are sure you should believe this answer much more).
'copper's' becomes 'cus' (chemical symbol).
'protecting' indicates putting letters inside.
'current' becomes 'i' (symbol for electric current).
'wine' becomes 'asti' (I've seen this before).
'eccles'+'cus'='ecclescus'
'i'+'asti'='iasti'
'ecclescus' enclosing 'iasti' is 'ECCLESIASTICUS'.

Can you help me to learn more?

(Another definition for ecclesiasticus that I've seen is " writing not acceptable to all".)

I've seen this clue in The Telegraph.
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