Direct Bill towards a flower going around tree (9)
I believe the answer is:
macadamia
'tree' is the definition.
(macadamia is a kind of tree)
'direct bill towards a flower going around' is the wordplay.
'direct' becomes 'aim' (I've seen this before).
'bill' becomes 'ada' (I am not sure about this - if you are sure you should believe this answer much more).
'towards' is a charade indicator (letters next to each other) (I've seen this in other clues).
'a flower' becomes 'cam' (I've seen this before).
'going around' says the letters should be written backwards.
'aim'+'ada'+'cam'='aimadacam'
'aimadacam' reversed gives 'MACADAMIA'.
(Other definitions for macadamia that I've seen before include "Am I a cad, ma? (anag) - Australian nut tree" , "Australian tree with edible nuts - a CIA madam (anag)" , "Edible nut" , "Nut-bearing tree" , "Queensland nut" .)