Aromatic plant suffering with contrary female gardener (8)
I believe the answer is:
costmary
'aromatic plant' is the definition.
(I've seen this before)
'suffering with contrary female gardener' is the wordplay.
'suffering' becomes 'cost' (I've seen this before).
'with contrary female gardener' becomes 'mary' (I am not sure about this - if you are sure you should believe this answer much more).
'cost'+'mary'='COSTMARY'
Can you help me to learn more?
(Other definitions for costmary that I've seen before include "Aromatic plant" , "Herb" .)