I think an APA or American IPA with citrusy American hops would be fantastic with a little Earl Grey in it. The citrus of the hops would complement the bergamot really well. I imagine a wit would also be quite nice. The bergamot would balance the orange peel and spices. But you'd have to have a very light touch or else the tea will overpower a light beer like a wit.
I personally have never brewed with tea - which is amazing, actually, because I drink tea every day. I have used herbal tea (chamomile) in a wit before per Jamil Zainasheff's recipe, but it was just a few grams in the boil for character. Not very noticeable.
If I set out to make a real tea-flavored beer, I'd make brewed tea and add it to the secondary or keg/bottling bucket, like I would with dry hops or "dry spices". Tea gets very tannic when boiled.
Another thing to keep in mind: bergamot is an oil, so using it may impact your head retention.
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