In Wales, fed on scraps from the dairy (5)
I believe the answer is:
dyfed
'scraps from the dairy' is the definition.
The definition suggests a singular noun which matches the answer.
'in wales fed on' is the wordplay.
'in wales' becomes 'dy' (I am not sure about this - if you are sure you should believe this answer much more).
'on' means one lot of letters go next to another.
'dy'+'fed'='DYFED'
Can you help me to learn more?
(Other definitions for dyfed that I've seen before include "Area of Wales" , "part of Wales" , "County in southwest Wales" , "It was Cardiganshire, Carmarthenshire and Pembrokeshire" , "Region of SW Wales" .)