Mahogany tree? (7)
I believe the answer is:
redwood
This clue might be a double definition.
'mahogany' is the first definition.
The definition and answer can be both plants as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'tree?' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for redwood that I've seen before include "big plant?" , "Giant California conifer" , "big in California?" , "Conservative MP" , "Tory MP" .)