What has branches providing part of our capital (6)
I believe the answer is:
poplar
'part of our capital' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for poplar that I've seen before include "Tall, slender tree" , "Tree of north temperate regions, with flowers borne in catkins" , "Tree with leaves that quiver" , "Timber tree" , "The tree is almost liked" .)