Crossword Genius

Each way but in only one direction (4)

Ross

I believe the answer is:

east

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'in only one direction' is the definition.
'east' can be an answer for 'direction' (compass direction). I am unsure of the 'in only one' bit.

'each way' is the wordplay.
'each' becomes 'ea' (abbreviation).
'way' becomes 'st' (abbreviation for street).
'ea'+'st'='EAST'

'but' acts as a link.

Can you help me to learn more?

(Other definitions for east that I've seen before include "Direction taken when going from the US towards Ireland" , "Opposite of west" , "Sunrise direction" , "Asia" , "Player in deal" .)

I've seen this clue in the Sydney Morning Herald.
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