A lot comes under it (6)

I believe the answer is:

hammer

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

'a lot' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for hammer that I've seen before include "It's applied to a nail" , "Drive nails" , "Auctioneer's mallet" , "Weaken, damage" , "Tool - trounce" .)

I've seen this clue in The Globe and Mail.

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