Danes designed seat (5)
I believe the answer is:
sedan
'seat' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'danes designed' is the wordplay.
'designed' is an anagram indicator (designed with the letters).
'danes' is an anagram of 'SEDAN'.
Can you help me to learn more?
(Other definitions for sedan that I've seen before include "Saloon car (US)" , "Type of chair - battle" , "Battle in 1940" , "Saloon car in America" , "outmoded form of transport" .)