Child's toy spooked Alice, unfortunately (12)
I believe the answer is:
kaleidoscope
'child's toy' is the definition.
(kaleidoscopes are often toys)
'spooked alice unfortunately' is the wordplay.
'unfortunately' is an anagram indicator (a bad or unfortunate spelling).
'spooked'+'alice'='spookedalice'
'spookedalice' with letters rearranged gives 'KALEIDOSCOPE'.
(Other definitions for kaleidoscope that I've seen before include "Device showing coloured patterns" , "Constantly changing pattern" , "A changing pattern of colours, shapes" , "Viewer offering reflections" , "colourful viewer" .)