It depends on the wine. Many wines will throw lees for months, while some others are clear after a week in secondary.
Dandelion takes forever to be totally clear, but my rhubarb wine was completely clear by 3 weeks old.
I have some apple wines that I made this fall that aren't quite crystal clear, but I have a blackberry wine that has been clear since about September.
I use pectic enzyme in almost all of my fruit wines, and that helps alot.
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