Crossword Genius

Block entered back to front (5)

Ross

I believe the answer is:

ingot

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

'block' is the definition.
(I know that ingot is a type of block)

'entered back to front' is the wordplay.
'entered' becomes 'ingo' (I can't explain this - if you can you should give a lot more credence to this answer).
'back to' indicates one should take the final letters.
The final letter of 'front' is 't'.
'ingo'+'t'='INGOT'

Can you help me to learn more?

(Other definitions for ingot that I've seen before include "Bar, brick of metal" , "Mass of metal, especially gold or silver" , "Piece of precious metal" , "Gold Stick" , "Moulded metal bar" .)

I've seen this clue in The Guardian.
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