Crossword Genius

Wall or fence set in a ditch so as not to interrupt the landscape (2-2)

Ross

I think it could be either:

Which length description are you looking for?:

4

2-2

ha-ha

(Other definitions for ha-ha that I've seen before include "Loud laugh" , "Sunk fence" , "Feature of posh garden" , "Hidden ditch" , "that I find amusing" .)

I've seen this clue in The Mirror.
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