What to wear with tweed jacket?
I prefer a heavy twill because it'll hang well.
you can't go wrong with Cordings or the equivalent:
It depends on colour and texture of the tweed. If it's brownish I'd go with white/cream chinos of the like, brown/tan brogues and a shirt with light blue in it, might be large line checks or solid colour. I wouldn't wear a tie if it's a jacket only, maybe a suit, but I would go with a losely folded pocket square.