Piece of cloth or timber at the bus terminus (4)
I believe the answer is:
sash
'piece of cloth' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'timber at the bus terminus' is the wordplay.
'timber' becomes 'ash' (I've seen this before).
'at' means one lot of letters go next to another (I've seen this in other clues).
'the bus terminus' becomes 's' (I can't explain this - if you can you should give a lot more credence to this answer).
'ash' after 's' is 'SASH'.
'or' acts as a link.
Can you help me to learn more?
(Other definitions for sash that I've seen before include "Girdle" , "Window frame; silk band" , "Framework to hold the panes of a window" , "Piece of cloth round waist or shoulder" , "Style of window" .)