Faulty timers on a domestic appliance (5,4)
I believe the answer is:
steam iron
'domestic appliance' is the definition.
(I know that steam iron is a type of domestic appliance)
'faulty timers on a' is the wordplay.
'faulty' indicates an anagram.
'timers'+'on'+'a'='timersona'
'timersona' with letters rearranged gives 'STEAM IRON'.
(Other definitions for steam iron that I've seen before include "Clothes presser" , "Clothes finisher" , "Domestic smoother" , "Tool that dampens and presses" , "Appliance for pressing" .)