Rosemary or basil (4)
I believe the answer is:
herb
I believe this is a double definition.
'rosemary' is the first definition.
(thesaurus)
'basil' is the second definition.
(basil is an example)
(Other definitions for herb that I've seen before include "Parsley, sage, rosemary or thyme?" , "Plant used in medicine or for flavouring" , "like Basil" , "Plant with leaves or seeds used medicinally" , "Simple" .)