Woman is the last in, having no love for the magus (4,3)

'the magus' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

'woman is the last in having no love' is the wordplay.
I cannot quite see how this works, but
'woman' could be 'ema' and 'ema' is found within the answer.
'is' is within the answer.
'no' could be 'n' (common abbreviation) and 'n' is located in the answer.
A single letter 'w' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

'for' acts as a link.

Can you help me to learn more?