Dizzy (5)
'dizzy' is the definition.
(I know that dizzy can be written as giddy)
This is all the clue.
(Other definitions for giddy that I've seen before include "Suffering from vertigo" , "Faint - excited" , "Dizzy - flighty" , "Light-headed; unable to balance" , "Vertiginous" .)
'dizzy' is the definition.
(I've seen this in another clue)
This is the entire clue.