Tie up an awkward flower (7)
I believe the answer is:
petunia
'flower' is the definition.
(type of flower)
'tie up an awkward' is the wordplay.
'awkward' indicates an anagram.
'tie'+'up'+'an'='tieupan'
'tieupan' is an anagram of 'PETUNIA'.
(Other definitions for petunia that I've seen before include "Auntie foolishly made under pressure" , "Flowering plant" , "Plant related to tobacco" , "Flower much used in hanging baskets" , "Garden plant with large funnel-shaped flower" .)