For leaves, Flora of South Africa (6)
I believe the answer is:
protea
'flora of south africa' is the definition.
The answer and definition can be both plants as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'for leaves' is the wordplay.
'for' becomes 'pro' (as in being 'pro' or in favour of something).
'leaves' becomes 'tea' (as in tea leaves).
'pro'+'tea'='PROTEA'
Can you help me to learn more?
(Other definitions for protea that I've seen before include "South African shrub" , "S.African flowering shrub" , "South African evergreen" , "South African plant" , "S. African shrub; to pear (anag.)" .)