Plant from India I set up in water (9)
I believe the answer is:
aquilegia
'plant' is the definition.
(aquilegia is a kind of plant)
'india i set up in water' is the wordplay.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'set' becomes 'gel ' (both can mean to harden).
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'in' means one lot of letters goes inside another.
'water' becomes 'aqua' (I've seen this before).
'i'+'gel'='igel'
'igel' back-to-front is 'legi'.
'i'+'legi'='ilegi'
'ilegi' inserted within 'aqua' is 'AQUILEGIA'.
'from' acts as a link.
(Other definitions for aquilegia that I've seen before include "Bloomer" , "Showy flower, also known as columbine" , "Flowering plant" , "Plant also known as Granny's Bonnet" .)