Plans revolutionary mess to spread around (7)
I believe the answer is:
schemes
'plans' is the definition.
(I know this)
'revolutionary mess to spread around' is the wordplay.
'revolutionary' becomes 'Che' (Che Guevara the Marxist revolutionary).
'to spread' indicates an anagram.
'around' indicates putting letters inside.
'mess' is an anagram of 'smes'.
'che' put within 'smes' is 'SCHEMES'.
(Other definitions for schemes that I've seen before include "''The best-laid ... o' mice an' men Gang aft a-gley''" , "Plans, plots, projects" .)