Plant given airtime as broadcast (9)
I believe the answer is:
artemisia
'plant' is the definition.
(I know that Artemisia is an plant)
'given airtime as broadcast' is the wordplay.
'given' says to put letters next to each other.
'broadcast' is an anagram indicator (letters scattered or cast around).
'airtime' put after 'as' is 'asairtime'.
'asairtime' is an anagram of 'ARTEMISIA'.
(Other definitions for artemisia that I've seen before include "Aromatic plant related to wormwood" , "Bitter tasting plant" , "Medicinal herb" , "flavour of absinthe" , "genus of plants" .)