Tool used erecting essential section of fireguard (5)

I believe the answer is:

auger

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

'tool' is the definition.
(auger is a kind of tool)

'erecting essential section of fireguard' is the wordplay.
'AUGER' is hidden back-to-front in amongst the letters.
But, I am unsure how the hidden word is indicated.

'used' is the link.

Can you help me to learn more?

(Other definitions for auger that I've seen before include "something that's boring" , "I bore" , "Boring-tool" , "Tool with spiral point for boring" , "A drilling tool" .)

I've seen this clue in The Irish Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.