Highest part of building making prof too dizzy (7)
I believe the answer is:
rooftop
'highest part of building' is the definition.
(I've seen this before)
'prof too dizzy' is the wordplay.
'dizzy' indicates anagramming the letters.
'prof'+'too'='proftoo'
'proftoo' is an anagram of 'ROOFTOP'.
'making' is the link.
(Other definitions for rooftop that I've seen before include "Might one be slated" , "High point of building (from which to shout?)" , "on the tiles?" , "may get slated?" , "Building's highest point" .)