Wise — herb (4)
I believe the answer is:
sage
This clue is a double definition.
'wise' is the first definition.
(similar in meaning)
'herb' is the second definition.
(I know that Sage is a type of herb)
(Other definitions for sage that I've seen before include "Velvety-leaved herb" , "Wise woman" , "Clever" , "___ and onion" , "Oracle; herb" .)