Be fond of sage, too (8)
I believe the answer is:
likewise
'too' is the definition.
(synonyms)
'be fond of sage' is the wordplay.
'be fond of' becomes 'like' (to like something is to be fond of it).
'sage' becomes 'wise' (similar in meaning).
'like'+'wise'='LIKEWISE'
(Other definitions for likewise that I've seen before include "Similarly, moreover" , "In similar manner" , "Also; similarly" , "In a similar fashion" , "In similar way" .)