Too much expected by a Parisian (5)
I believe the answer is:
undue
'too much' is the definition.
(I've seen this before)
'expected by a parisian' is the wordplay.
'expected' becomes 'due' (similar in meaning).
'by' means one lot of letters go next to another.
'a parisian' becomes 'un' ('a' in French).
'due' after 'un' is 'UNDUE'.
(Other definitions for undue that I've seen before include "Extreme" , "Not warranted" , "Excessive amount" , "Excessive, unreasonable" , "Lacking justification" .)