Type that's dubbed revolutionary in later issues (3)
I believe the answer is:
sir
'type that's dubbed' is the definition.
I can't tell whether this definition defines the answer.
'revolutionary in later issues' is the wordplay.
'revolutionary' is a reversal indicator.
'in' indicates the answer is hidden within the clue.
'ris' can be found hidden inside 'later issues'.
'ris' reversed gives 'SIR'.
Can you help me to learn more?
(Other definitions for sir that I've seen before include "Title given to 10 Across" , "Title of 1 across" , "Male form of address" , "Term of address for a gentleman" , "Formal term of address" .)