A setter making a row (5)
I believe the answer is:
layer
This might be a double definition.
'a setter' is the first definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'a row' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'making' is the link.
Can you help me to learn more?
(Other definitions for layer that I've seen before include "Source of eggs" , "Seam" , "One supplying eggs" , "Early (anag.)" , "Bed - hen" .)