Crossword Genius

Curses at cashier halfway through visiting abroad (5)

Ross

I believe the answer is:

oaths

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'curses' is the definition.
(I know this)

'at cashier halfway through visiting abroad' is the wordplay.
'halfway through' indicates the central letters.
'visiting' indicates putting letters inside.
'abroad' becomes 'os' (I can't explain this - if you can you should believe this answer much more).
The central letter of 'cashier' is 'h'.
'at'+'h'='ath'
'ath' put into 'os' is 'OATHS'.

Can you help me to learn more?

(Other definitions for oaths that I've seen before include "truths may be established by them" , "Cursing" , "Expletives" , "Solemn vows" , "four-letter words" .)

I've seen this clue in the Sydney Morning Herald.
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