A fashionable area might – just (7)
I believe the answer is:
mayfair
'a fashionable area' is the definition.
'mayfair' can be an answer for 'area' (I have seen 'Area of London ' mean 'mayfair' so perhaps 'area' could also mean 'mayfair'). I'm not certain of the 'a fashionable' bit.
'might just' is the wordplay.
'might' becomes 'may' (I've seen this before).
'just' becomes 'fair' (just can mean fair in the sense of showing justice).
'may'+'fair'='MAYFAIR'
Can you help me to learn more?
(Other definitions for mayfair that I've seen before include "Prosperous part of our capital" , "smart residential district" , "part of London" , "Fashionable district in West London" , "Go immediately after this" .)