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Singular pre-erotic recommendation, one preventing reproduction (10)

Ross

I believe the answer is:

antipiracy

I'm a little stuck... Click here to teach me more about this clue!

'singular pre-erotic recommendation' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'one preventing reproduction' is the wordplay.
I cannot quite see how this works, but
'one' could be 'an' (I've seen this in other clues) and 'an' is present in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Independent.
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