Plant with a name featured in song (7)
I believe the answer is:
dittany
'plant' is the definition.
(dittany is a kind of plant)
'with a name featured in song' is the wordplay.
'with' is an insertion indicator.
'name' becomes 'n' (common abbreviation e.g. on forms).
'featured in' indicates putting letters inside.
'song' becomes 'ditty' (ditty is a kind of song).
'n' going into 'ditty' is 'dittny'.
'a' placed inside 'dittny' is 'DITTANY'.
(Other definitions for dittany that I've seen before include "Shrub" , "oil-producer" , "Aromatic plant" .)