Crossword Genius

This for the luck of the draw? (9,6)

Ross

I believe the answer is:

horseshoe magnet

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

'this for the luck' is the definition.
The definition suggests a singular noun which matches the answer.

'the draw?' is the wordplay.
I cannot quite understand how this works, but
'draw?' could be 'magnet' (I've seen this before) and 'magnet' is present in the answer.
The remaining letters 'horseshoe' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'of' is the link.

Can you help me to learn more?

(Another definition for horseshoe magnet that I've seen is " what's attractive".)

I've seen this clue in The Independent.
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