Crossword Genius

Champion has a heading (5-6)

Ross

I believe the answer is:

title-holder

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

'champion' is the definition.
(I know that champion can be written as title-holder)

'a heading' is the wordplay.
I cannot quite understand how this works, but
'heading' could be 'title' (title is a kind of heading) and 'title' is present in the answer.
The remaining letters 'holder' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'has' is the link.

Can you help me to learn more?

I've seen this clue in The Mirror.
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