Spotted being slightly crazy (5)
I believe the answer is:
dotty
I believe this is a double definition.
'spotted' is the first definition.
(thesaurus)
'slightly crazy' is the second definition.
(I've seen this before)
'being' acts as a link.
(Other definitions for dotty that I've seen before include "Mildly eccentric" , "Slightly crazy" , "Silly; crazy" , "Barking" , "Slightly mad (colloq.)" .)