Minute Cryptic

Our definition here is 'some time', and our answer will be a word that represents some time.

This clue's indicators are 'divided', 'over', and 'the shape of'. One of these is a selection indicator flagging that instead of taking all the letters of a neighbouring word, we need to take just a fraction. Another is a containing indicator - some letters will go around some other fodder. And a third is a homoglyph indicator guiding us to pay attention to what an item in the clue looks like and to find a lookalike letter.

This clue's fodder is 'Arthur' and 'Camelot’s table'. We'll need to substitute one of these with a representative letter and use it with the letters of the other (or some of them) to construct our answer - all as guided by the clue's indicator(s).