Complete view (6)
'complete view' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eyeful that I've seen before include "Something worth seeing" , "beauty!" , "Fascinating sight" , "A (lovely) sight to behold" , "Attractive sight" .)
(Other definitions for panorama that I've seen before include "Broad view (of BBC TV?)" , "Extensive all-round view" , "Current affairs programme" , "Comprehensive survey" , "Impressive view" .)