Appliance repaired in Cheam (7)
I believe the answer is:
machine
'appliance' is the definition.
(thesaurus)
'repaired in cheam' is the wordplay.
'repaired' indicates anagramming the letters.
'in'+'cheam'='incheam'
'incheam' with letters rearranged gives 'MACHINE'.
(Other definitions for machine that I've seen before include "Industrial worker" , "See 12" , "Chain me to power-driven apparatus" , "Powered mechanism" , "Mechanical or electrical device" .)