External rendering round one square column (8)
I believe the answer is:
pilaster
This could be a double definition.
'external rendering round' is the first 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?
'one square column' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for pilaster that I've seen before include "Rectangular column projected from wall" , "Piles tar into a form of column" , "Rectangular column support projecting slightly from a wall" , "Square column" , "Decorative column standing out from the fa?ade of a building" .)