Crossword Genius

Where nail is being auctioned? (5,3,6)

Ross

I believe the answer is:

under the hammer

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

'where nail' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'being auctioned?' is the wordplay.
I cannot really understand how this works, but
'being' could be 'ham' (ham is a kind of being) and 'ham' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'is' acts as a link.

Can you help me to learn more?

(Other definitions for under the hammer that I've seen before include "on the block" , "Lots come here" , "For sale by auction" , "Ensure your thumb is not" , "a lot?" .)

I've seen this clue in the Sydney Morning Herald.
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