Part of Mayfair is home for some Europeans (5)
I believe the answer is:
irish
'some europeans' is the definition.
'part of mayfair is home' is the wordplay.
'part of' indicates a hidden word.
'IRISH' is hidden in the letters of 'mayfair is home'.
'for' acts as a link.
(Other definitions for irish that I've seen before include "Like Wilde or Yeats" , "Of this place" , "W European" , "like Wexford" , "From Eire" .)