Crossword Genius

Painless choice to remove caps in sanctuary (6)

Ross

I believe the answer is:

asylum

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

'sanctuary' is the definition.
(I know that sanctuary can be written as asylum)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for asylum that I've seen before include "Harbour" , "Place of shelter or refuge" , "Safe place of refuge" , "Shelter given to refugee" , "'Refuge, sanctuary (6)'" .)

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