Crossword Genius

Shade nave (5)

Ross

I believe the answer is:

green

I'm a little stuck... Click here to teach me more about this clue!

This could be a double definition.

'shade' is the first definition.
(I know that Green is a type of shade)

'nave' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

Can you help me to learn more?

(Other definitions for green that I've seen before include "part of the golf course" , "Grassy area; naive" , "Murderer" , "Environmental - colour" , "Village space" .)

I've seen this clue in The Mirror.
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