Bird losing tail, pinned down by wood and stone (6)
I believe the answer is:
ashlar
This might be a double definition.
'bird losing tail pinned down by wood' 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?
'stone' is the second definition.
(I know that ashlar is a type of stone)
'and' acts as a link.
Can you help me to learn more?
(Other definitions for ashlar that I've seen before include "Large square-cut stone" , "wall-facing" , "Rectangular block of hewn stone" , "Dressed stone block" , "building material" .)