Artilleryman introducing a herbaceous plant (7)
I believe the answer is:
gunnera
'herbaceous plant' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'artilleryman introducing a' is the wordplay.
'artilleryman' becomes 'gunner' (synonyms).
'introducing' is a charade indicator (letters next to each other) (some letters go before others).
'gunner'+'a'='GUNNERA'
Can you help me to learn more?
(Other definitions for gunnera that I've seen before include "It grows" , "Waterside plant with very large leaves" , "Very large-leaved shrub" , "Large-leaved plant" .)