Group of universities that is vaguely organised centrally? (3,6)
I believe the answer is:
ivy league
'group of universities' is the definition.
(group of US universities)
'that is vaguely organised centrally?' is the wordplay.
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'organised' indicates an anagram.
'centrally?' is an insertion indicator.
'vaguely' is an anagram of 'vyleagu'.
'ie' going around 'vyleagu' is 'IVY LEAGUE'.
(Other definitions for ivy league that I've seen before include "Group of US colleges with prestigious reputations" , "Prestigious group of US universities" , "Group of long-established universities of eastern USA including Harvard and Yale" , "Group of eight leading US universities" , "Group of US elite universities" .)