Flash banker suggests Mancini hit? (4,5)
I believe the answer is:
moon river
'mancini hit?' is the definition.
(I've seen this in another clue)
'flash banker' is the wordplay.
I cannot really understand how this works, but
'flash' could be 'mo' (both mean a very short period of time) and 'mo' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'suggests' acts as a link.
Can you help me to learn more?
(Another definition for moon river that I've seen is " Song sung by Sinatra".)