Alma's mum? (5)
I believe the answer is:
mater
This clue might be a double definition.
'alma's' is the first definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'mum?' is the second definition.
('mater' is an old-fashioned term for mother)
Can you help me to learn more?
(Other definitions for mater that I've seen before include "parent" , "Dam" , "An old Roman mother" , "Mother (sl.)" , "One marrying" .)