Crossword Genius

Opens pub under railway platform, lovely environment in the shade (6)

Ross

I believe the answer is:

purple

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

'shade' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for purple that I've seen before include "Colour between 14dn and blue" , "Red-blue mixture" , "shade" , "Colour of the angry" , "Red and blue mix" .)

I've seen this clue in the Sydney Morning Herald.
Want a hint initially instead of a full solution? Install my app