Crossword Genius

Metric unit of area (3)

Ross

I believe the answer is:

are

'metric unit of area' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for are that I've seen before include "Exist; square measure" , "(We/they/you) exist" , "(We/you/they) exist" , "live" , "(They/you/we) exist" .)

I've seen this clue in The Times and The Independent.
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