Form most of stanza number one travelling north (7)
I believe the answer is:
version
'form' is the definition.
(I know that version is a type of type)
'most of stanza number one travelling north' is the wordplay.
'most of' means to remove the last letter.
'stanza' becomes 'verse' (I've seen this in another clue).
'number one' becomes 'no i' (resembles No 1).
'travelling north' says the letters should be written in reverse (in a down clue, letters go up).
'noi' written backwards gives 'ion'.
'verse' with its last letter removed is 'vers'.
'vers'+'ion'='VERSION'
(Other definitions for version that I've seen before include "Account from one point of view" , "Particular form (of something)" , "Description from a certain point of view" , "Rendering" , "Translation - personal account" .)