Having money, we brought back nut-tree (6)
I believe the answer is:
cashew
'nut-tree' is the definition.
(I've seen this before)
'having money we brought back' is the wordplay.
'having money' becomes 'cash' (I am not sure about this - if you are sure you should believe this answer much more).
'brought back' says the letters should be written in reverse.
'we' backwards is 'ew'.
'cash'+'ew'='CASHEW'
Can you help me to learn more?
(Other definitions for cashew that I've seen before include "Common type of nut" , "Edible nut" , "Kind of nut" , "snack perhaps" , "Chew as you would this nut" .)