Crossword Genius

Silent mother (3)

Ross

I believe the answer is:

mum

I believe this is a double definition.

'silent' is the first definition.
(keep mum)

'mother' is the second definition.
(informal term for mother)

(Other definitions for mum that I've seen before include "Mother - she's the word for secrecy" , "Palindromic mater" , "Tight-lipped" , "Parent (who's kept or is the word!)" , "Keep it secret from mother?" .)

I've seen this clue in The Times.
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