Spoil a table (4)
I believe the answer is:
rota
'table' is the definition.
(thesaurus)
'spoil a' is the wordplay.
'spoil' becomes 'rot' (I've seen this in another clue).
'rot'+'a'='ROTA'
(Other definitions for rota that I've seen before include "List of duties to be done, or people to do them" , "List of people taking turns" , "supreme Catholic court" , "Roll call or roster" , "Work schedule" .)