Ancient king, father of about six? (5)

I believe the answer is:

david

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

'ancient king' is the definition.
'david' can be an answer for 'king' (I have seen 'Hebrew king' mean 'david' so perhaps 'king' could also mean 'david'). I am unsure of the 'ancient' bit.

'father of about six?' is the wordplay.
'father of' becomes 'dad' (I am not sure about this - if you are sure you should believe this answer much more).
'about' indicates putting letters inside.
'six?' becomes 'VI' (Roman numerals).
'dad' enclosing 'vi' is 'DAVID'.

Can you help me to learn more?

(Other definitions for david that I've seen before include "- Copperfield (Dickens)" , "Goliath's slayer" , "Man's name" , "The Psalmist" , "Michelangelo statue" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.