Perfect university head I paint regularly (7)
I believe the answer is:
utopian
'perfect' is the definition.
('utopian' is associated in meaning with 'perfect')
'university head i paint regularly' is the wordplay.
'university' becomes 'u'.
'head' becomes 'top' ('top' can be a synonym of 'head'**).
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'paint' are 'an'.
'u'+'top'+'i'+'an'='UTOPIAN'
(Other definitions for utopian that I've seen before include "Of ideal perfection (as More's state)" , "More work was literally so" , "Just perfect, as in Thomas More's ideal country" , "Idealistic but usually impractical" , "Thomas More-ish?" .)