Is title arranged solely for one of the top set? (7)
I believe the answer is:
elitist
'solely for one of the top set?' is the definition.
(for 'top' people)
'is title arranged' is the wordplay.
'arranged' indicates an anagram.
'is'+'title'='istitle'
'istitle' anagrammed gives 'ELITIST'.
(Other definitions for elitist that I've seen before include "for the cream" , "Favouring exclusivity" , "Member of a self-regarding group" , "One without the common touch" , "(One who is) discriminating in favour of select few" .)