He's on the way to somewhere in Germany (5)
I believe the answer is:
hesse
'germany' is the definition.
Both the answer and definition are singular nouns.
Maybe there's an association between them I don't understand?
'he's on the way to somewhere' is the wordplay.
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'the way' becomes 's' (Compass direction - South).
'to somewhere' becomes 'se' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'he'+'s'+'se'='HESSE'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for hesse that I've seen before include "poet" , "writer in Germany" , "Hermann --, German author" , "German state, capital Weisbaden" , "Ger. state; Hermann ---, novelist" .)