Model soldier to travel north (7)
I believe the answer is:
paragon
'model' is the definition.
(paragon is a kind of model)
'soldier to travel north' is the wordplay.
'soldier' becomes 'para' (para is a kind of soldier**).
'to travel' becomes 'go' ('go' can be a synonym of 'travel').
'north' becomes 'n' ('N' can be a synonym of 'north').
'para'+'go'+'n'='PARAGON'
(Other definitions for paragon that I've seen before include "A model as of virtue" , "Role model" , "Flawless model" , "Model of conduct" , "An ideal" .)