Modern teething result went first (10)
I believe the answer is:
newfangled
'modern' is the definition.
(newfangled means modern or fashionable)
'teething result went first' is the wordplay.
I cannot quite understand how this works, but
'went' could be 'angled' (angling is a kind of going) and 'angled' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for newfangled that I've seen before include "Freshly developed and unfamiliar" , "Modern and familiar" , "on the bleeding edge?" , "(Unnecessarily) different from what one is used to" , "like nothing seen before" .)