Origins of botany? (5)
I believe the answer is:
roots
'origins' is the definition.
(I know this)
'of botany?' is the wordplay.
I cannot quite understand how this works, but
'of' could be 'o' and 'o' is present in the answer.
The remaining letters 'rots' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for roots that I've seen before include "Radicals" , "Shows enthusiastic support for" , "Underground growths" , "Underground parts of a plant" , "ethnic music in > TV series" .)