Rug gets round part of defence (4)
I believe the answer is:
moat
'defence' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'rug gets round part' is the wordplay.
'rug' becomes 'mat' (both are floor coverings).
'gets round' becomes 'o' (I've seen this in other clues).
'part' indicates putting letters inside (one word creates a gap in ie parts another word).
'mat' going around 'o' is 'MOAT'.
'of' is the link.
Can you help me to learn more?
(Other definitions for moat that I've seen before include "Water defence" , "Castle's ditch" , "Ditch dug to protect a castle" , "Water-filled trench around a castle" , "Water-filled ditch around stronghold" .)