Often found in domestic service (7)
I believe the answer is:
utensil
'often found in domestic service' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for utensil that I've seen before include "Mandolin, perhaps" , "vessel" , "Handy kitchen tool" , "one's employed in the kitchen" , "A kitchen instrument or container" .)