Information on container that protects a plant (7)
I believe the answer is:
gentian
'plant' is the definition.
The answer is an example.
'information on container that protects a' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'on' means one lot of letters go next to another.
'container' becomes 'tin' (tin is a kind of container).
'that protects' means one lot of letters goes inside another.
'tin' placed around 'a' is 'tian'.
'gen'+'tian'='GENTIAN'
(Other definitions for gentian that I've seen before include "Antigen in vivid blue flower" , "Blue, violet alpine plant" , "Violet's partner" , "Violet/blue Alpine flower" , "plant providing tonic" .)