Crossword Genius

No railway covers the route initially going from London to Edinburgh? (9)

Ross

I believe the answer is:

northerly

I'm a little stuck... Click here to teach me more about this clue!

'going from london to edinburgh?' is the definition.
I can't tell whether this definition defines the answer.

'no railway covers the route initially' is the wordplay.
'railway' becomes 'rly' ().
'covers' indicates putting letters inside.
'initially' indicates taking the first letters.
The initial letter of 'route' is 'r'.
'the'+'r'='ther'
'rly' placed around 'ther' is 'rtherly'.
'no'+'rtherly'='NORTHERLY'

Can you help me to learn more?

(Other definitions for northerly that I've seen before include "it may be a bitter blow" , "From cold parts" , "like Newcastle?" , "Wind blowing south" .)

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