Answer:
Up on high I wave away but not a word can I say.
This is a shape and a symbol that we literally cannot live without. What is it?
Lots of them make up a word, And lots of words are in them. It's easy when you think about it. A while ago we stamped and mailed them.
This is meat from the upper part of a pig's leg salted and dried or smoked, often enjoyed in a sandwich.
When it's dirty this should never be aired in public.
I can only be played on a windy day