Ointment found among herbal medicines (4)
I believe the answer is:
balm
'ointment' is the definition.
('balm' can be a synonym of 'ointment')
'among herbal medicines' is the wordplay.
'among' indicates the answer is hidden within the clue.
'BALM' can be found hidden inside 'herbal medicines'.
'found' is the link.
(Other definitions for balm that I've seen before include "A soothing influence on lamb" , "skin cream" , "Soothing ointment for lamb (4)" , "Something soothing" , "Fragrant and healing ointment" .)