Sample to include old domestic appliance (7)
I believe the answer is:
toaster
'appliance' is the definition.
(toaster is a kind of appliance)
'sample to include old domestic' is the wordplay.
'sample' becomes 'taster' (I've seen this before).
'to include' indicates putting letters inside.
'old domestic' becomes 'o' (I am not sure about this - if you are sure you should believe this answer much more).
'taster' going around 'o' is 'TOASTER'.
Can you help me to learn more?
(Other definitions for toaster that I've seen before include "Kitchen gadget" , "kitchen equipment" , "something in kitchen" , "Device using sliced bead" , "one that suggests health" .)