Go in to get a bean. I come out with a flower! (7)
I believe the answer is:
begonia
'flower' is the definition.
(I know that Begonia is a type of flower)
'go in to get a bean i come out' is the wordplay.
'in' indicates putting letters inside.
'to get' says to put letters next to each other.
'come out' indicates anagramming the letters.
'bean' put next to 'i' is 'beani'.
'beani' is an anagram of 'benia'.
'go' inserted inside 'benia' is 'BEGONIA'.
'with a' is the link.
(Other definitions for begonia that I've seen before include "bloomer" , "Common garden plant" , "Herbaceous plant whose flowers have no petals" , "Tropical plant" , "colourful flower" .)