Flower in store (5)
I believe the answer is:
stock
This clue is a double definition.
'flower' is the first definition.
(I know that stock is a type of flower)
'store' is the second definition.
(I know that store can be written as stock)
'in' is the link.
(Other definitions for stock that I've seen before include "Neck garment" , "Keep" , "Shares - soup" , "Farm animals; plant" , "soup ingredient" .)