Possible Clues:

• A human made it: a truth Irish broadcasters accepted
• Archaeological find
• Fat trace processed in manufactured product
• Cultural item from Mozart, not half European? Truth
• Something known to be associated with human skill and endeavour, primarily?
• Tart cafe served up is a hand-made thing
• Upset after performance one's created
• Transport café: traveller holds up object of interest
• Man-made object, British style
• Most of 23 down is English and that's the reality in the museum