Crossword Genius

Scrabble has four of these things rambler may need to negotiate (6)

Ross

I believe the answer is:

stiles

'things rambler may need to negotiate' is the definition.
(stiles are gates a rambler might climb over)

I can't explain the rest of the clue.

(Other definitions for stiles that I've seen before include "Sets of steps in fences" , "Steps to help walkers over fences or walls" , "Sets of steps in a fence" , "Fence-steps in islets" .)

I've seen this clue in The Times.
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