Albert and Sarah honour Davidson? (7)

I believe the answer is:

absalom

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'davidson?' is the definition.
I can't tell whether this definition defines the answer.

'albert and sarah honour' is the wordplay.
'albert' becomes 'ab' (I can't justify this - if you can you should believe this answer much more).
'and' is a charade indicator (letters next to each other).
'sarah' becomes 'Sal' (Sally is a common pet form of Sarah).
'honour' becomes 'om'.
'ab'+'sal'+'om'='ABSALOM'

Can you help me to learn more?

(Other definitions for absalom that I've seen before include "David's third son (OT)" , "David's boy" , "Son of King David (Bible)" , "Son of King David (OT)" , "King's rebellious son" .)

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

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