Oils on the counter — limited bottles prepared afresh (9)
I believe the answer is:
retrained
'oils on the counter limited bottles prepared afresh' is the definition.
I can't tell whether this defines the answer.
'oils on the counter limited bottles prepared' is the wordplay.
'oils on the counter limited bottles' becomes 're' (I can't explain this - if you can you should give a lot more credence to this answer).
'prepared' becomes 'trained' ('train' can be a synonym of 'prepare').
're'+'trained'='RETRAINED'
Can you help me to learn more?
(Other definitions for retrained that I've seen before include "prepared for a new role" , "On losing job, worker may be" , "made fit for new role" .)