Spare tea-set put aside (8)
I believe the answer is:
separate
'put aside' is the definition.
(thesaurus)
'spare tea-set' is the wordplay.
'set' indicates anagramming the letters (instruction to set the letters).
'spare'+'tea'='sparetea'
'sparetea' anagrammed gives 'SEPARATE'.
(Other definitions for separate that I've seen before include "Pull apart" , "Distinct or discrete" , "Not joined or touching" , "Not joined or united with others" , "Move" .)