Thingamabob (9)
'thingamabob' is the definition.
(synonyms)
This is all the clue.
(Other definitions for gizmo that I've seen before include "Gadget, thingamajig" , "Thingamabob, gadget" , "Ingenious device; gadget" , "Device or control that is very useful for a particular job" .)
'thingamabob' is the definition.
(synonyms)
This is all the clue.
(Another definition for doohickey that I've seen is " American gizmo".)