What may be seen in Manhattan is a film about greed (4,6)
I believe the answer is:
wall street
'film about greed' is the definition.
'wall street' can be an answer for 'film' (1987 film). I'm not sure about the 'about greed' bit.
'what may be seen in manhattan' is the wordplay.
I cannot really see how this works, but
'may' could be 'tree' (I've seen this before) and 'tree' is found in the answer.
'in manhattan' could be 'wallst' ('Wall St.' is part of 'manhattan') and 'wallst' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'is a' acts as a link.
Can you help me to learn more?
(Other definitions for wall street that I've seen before include "Financial hub" , "business centre" , "Financial district" , "Finance hub" , "part of Manhattan" .)