Wife and I would obtain gizmo (6)
I believe the answer is:
widget
'gizmo' is the definition.
('widget' can be a synonym of 'gizmo')
'wife and i would obtain' is the wordplay.
'wife' becomes 'w'.
'and' says to put letters next to each other.
'i would' becomes 'id'.
'obtain' becomes 'get' ('get' can be a synonym of 'obtain').
'w'+'id'+'get'='WIDGET'
(Other definitions for widget that I've seen before include "Useful device for a particular job?" , "Funny little device" , "Beer-can device" , "Small gadget" , "Gismo" .)