A woman's song about British dried plant collections (8)
I believe the answer is:
herbaria
'plant collections' is the definition.
(I've seen this before)
'a woman's song about british' is the wordplay.
'a woman's' becomes 'her' (belonging to a woman).
'song' becomes 'aria' (piece of music in an opera).
'about' means one lot of letters go next to another.
'british' becomes 'b' (abbreviation e.g. in BBC).
'aria' after 'b' is 'baria'.
'her'+'baria'='HERBARIA'
'dried' acts as a link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for herbaria that I've seen before include "Collections of dried plants" , "Basil may be in these rooms" , "set of plant collections" .)