Small revolutionary, briefly boring, foundation volume or book (8)
I believe the answer is:
schedule
'book' is the definition.
(thesaurus)
'small revolutionary briefly boring foundation volume' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'briefly boring foundation volume' becomes 'dule' (I can't explain this - if you can you should believe this answer much more).
's'+'che'+'dule'='SCHEDULE'
'or' acts as a link.
Can you help me to learn more?
(Other definitions for schedule that I've seen before include "Plan of activities" , "List - inventory" , "Timetable; plan of action" , "Plan of times and events" , "Clues he'd dropped about timetable" .)