Book about being behind revolutionary issue (7,4)
I believe the answer is:
closing time
'book' is the definition.
(Joseph Heller novel)
'being behind revolutionary issue' is the wordplay.
'being' becomes 'closing' (I can't justify this - if you can you should believe this answer much more).
'behind' is a charade indicator (letters next to each other).
'revolutionary' says the letters should be written in reverse.
'issue' becomes 'emit' (I've seen this before).
'emit' backwards is 'time'.
'closing'+'time'='CLOSING TIME'
'about' is the link.
(Other definitions for closing time that I've seen before include "when the pub shuts" , "End of (drinking) session" .)