Crossword Genius

Measure back door (4)

Ross

I believe the answer is:

rood

'measure' is the definition.
(thesaurus)

'back door' is the wordplay.
'back' says the letters should be written backwards.
'door' back-to-front is 'ROOD'.

(Other definitions for rood that I've seen before include "Old land measure and large cross in a church" , "Crucifix on part of an acre" , "Crucifix; old land area measure" , "old piece of land" , "- Loft; - screen" .)

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