One in secret almost infiltrating second Rocky (8)
I believe the answer is:
marciano
'one' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Another definition for marciano that I've seen is " old boxer".)
Want a hint initially instead of a full solution?
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