Loophole in ANZ & NAB merger creates windfall (7)
I believe the answer is:
bonanza
'windfall' is the definition.
(situation leading to an increase in wealth)
'loophole in anz nab merger' is the wordplay.
I cannot really understand how this works, but
an anagram of 'anz' is 'nza' which is located in the answer.
The remaining letters 'bona' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'creates' is the link.
Can you help me to learn more?
(Other definitions for bonanza that I've seen before include "Sudden influx of wealth" , "Source of sudden wealth, windfall (7)" , "Unexpected wealth or luck" , "Source of great and sudden wealth" , "Huge stroke of luck" .)