Just go down until pathway ends (4)

I believe the answer is:

only

'just' is the definition.
(synonyms)

'go down until pathway ends' is the wordplay.
'ends' says to take the final letters.
The final letters of 'go down until pathway' are 'ONLY'.

(Other definitions for only that I've seen before include "Unique; merely" , "Siblingless (child)" , "Mere" , ". . . . the Lonely (sung by Roy Orbison)" , "Except that; single" .)

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

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