Mother sadly has to stand up in greeting (6)

I believe the answer is:

salaam

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'greeting' is the definition.
(salaam is an Arabic greeting)

I don't understand how the rest of the clue works.

(Other definitions for salaam that I've seen before include "Muslim greeting signifying peace" , "An Oriental greeting meaning peace" , "An Oriental salute or bow" , "Oriental bow and salutation" , "Peaceful greeting" .)

I've seen this clue in The Globe and Mail.

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