Well-spoken German wearing sword
I believe the answer is:
cut glass
'well-spoken german wearing sword' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'german wearing sword' is the wordplay.
'german' becomes 'g' (abbreviation).
'wearing' means one lot of letters goes inside another.
'sword' becomes 'cutlass' (cutlass is a kind of sword).
'g' put within 'cutlass' is 'CUT GLASS'.
Can you help me to learn more?
(Other definitions for cut glass that I've seen before include "Posh" , "ornamental tableware" , "Was crafted in Waterford" , "Vases or bowls decorated by grinding - (of accent) upper-class" , "Crystal" .)