Where nail is being auctioned? (5,3,6)
I believe the answer is:
under the hammer
'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?" .)