Awestruck, head academic turned page. (5)
I believe the answer is:
agape
'awestruck' is the definition.
(I've seen this in another clue)
'head academic turned page' is the wordplay.
'head' suggests taking the first letters.
'turned' indicates anagramming the letters.
The initial letter of 'academic' is 'a'.
'page' anagrammed gives 'gape'.
'a'+'gape'='AGAPE'
(Other definitions for agape that I've seen before include "Christian's love" , "Christian feast" , "love feast" , "showing disbelief" , "Astonished" .)