Crossword Genius

Tally gold, for one, in holy book (6)

Ross

I believe the answer is:

bauble

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

'tally' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'gold for one in holy book' is the wordplay.
I cannot quite understand how this works, but
'gold' could be 'au' (Au is the chemical symbol for gold) and 'au' is located in the answer.
'book' could be 'b' (abbreviation for book) and 'b' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for bauble that I've seen before include "Showy trinket" , "Gaudy toy" , "Christmas tree decoration" , "Small cheap trinket" , "'Bead, trinket (6)'" .)

I've seen this clue in the Sydney Morning Herald.
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