In putsch, this person is to emerge (4,2)
I believe the answer is:
come up
'to emerge' is the definition.
(thesaurus)
'in putsch this person' is the wordplay.
'in' is an insertion indicator.
'putsch' becomes 'coup' (synonyms).
'this person' becomes 'me' (the person writing).
'coup' enclosing 'me' is 'COME UP'.
'is' acts as a link.
(Other definitions for come up that I've seen before include "Mae West saying ' . . . . . . sometime 'n see me' - ascend" , "Mae West invitation ''. . . . . . sometime and see me" , "Experience rising" , "appear" .)