A lot of "winter/christmas" beers are just white/wit beer based with your basic "winter spices" like you mentioned. Cinnamon, nutmeg, clove, allspice, ginger. citrus peel....even some of the "odder" spices work well in those blends, like cardamom or coriander.
Also dark fruits are common, figs, dates, plums, also pumpkin, sweet potato, cranberries....Heck even organic mince meat might be interesting (Just make sure it doesn't contain suet or fat.)
Think about the desserts and foods available at this time of year, and those are the flavors that you can work into a good base beer.
That blonde base with maybe figs or dates and a nice spice blend would be perfect.
Like my snazzy new avatar? Get Sons of Zymurgy swag, here, and brew with the best.
Revvy's one of the cool reverends. He has a Harley and a t-shirt that says on the back "If you can read this, the bitch was Raptured. - Madman
I gotta tell ya, just between us girls, that Revvy is HOT. Very tall, gorgeous grey hair and a terrific smile. He's very good looking in person, with a charismatic personality... he drives like a ****ing maniac! - YooperBrew