I bag one wild flower (7)
I believe the answer is:
begonia
'flower' is the definition.
(I know that Begonia is a type of flower)
'i bag one wild' is the wordplay.
'wild' indicates an anagram.
'i'+'bag'+'one'='ibagone'
'ibagone' with letters rearranged gives 'BEGONIA'.
(Other definitions for begonia that I've seen before include "bloomer" , "Tropical plant" , "colourful flower" , "Common garden plant" , "Herbaceous plant whose flowers have no petals" .)