Crossword Genius

Piece of artillery that's used by builders? (6)

Ross

I believe the answer is:

mortar

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

'piece of artillery' is the definition.
'mortar' can be an answer for 'artillery' (mortar is a kind of artillery). I'm not certain of the 'piece of' bit.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for mortar that I've seen before include "Brick-joining material or short cannon" , "Bonding for brickwork - small cannon" , "Bond for bricks; weapon" , "Brick bonding mixture" , "Brick cement" .)

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