Information on a tinned plant (7)
I believe the answer is:
gentian
'plant' is the definition.
(gentian is a kind of plant)
'information on a tinned' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'a tinned' becomes 'tian' (I can't justify this - if you can you should give a lot more credence to this answer).
'gen'+'tian'='GENTIAN'
Can you help me to learn more?
(Other definitions for gentian that I've seen before include "Violet's partner" , "sort of violet" , "Plant, usually with blue flowers" , "Flower - antigen (anag)" , "Kind of violet dye used as antiseptic" .)