King captured in revolutionary month is shown to be innocent (7)
I believe the answer is:
cleared
'to be innocent' is the definition.
('cleared' can be similar in meaning to 'innocent')
'king captured in revolutionary month' is the wordplay.
'king' becomes 'lear' (Shakespeare's King Lear).
'captured in' is an insertion indicator.
'revolutionary' shows that the letters should be reversed in order (letters revolve around).
'month' becomes 'dec' (abbreviation for December).
'dec' backwards is 'ced'.
'lear' inserted into 'ced' is 'CLEARED'.
'is shown' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for cleared that I've seen before include "found not guilty" , "Profited by" , "Brightened up" , "approved" , "Jumped over" .)