Spare from socialist excess
I believe the answer is:
leftover
'spare' is the definition.
(thesaurus)
'socialist excess' is the wordplay.
'socialist' becomes 'left' ('left' is associated in meaning with 'socialist').
'excess' becomes 'over' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'left'+'over'='LEFTOVER'
'from' is the link.
Can you help me to learn more?
(Other definitions for leftover that I've seen before include "Remnant" , "something you'd keep on the plate!" , "What remains" , "Finally unused" , "Remaining" .)