Crossword Genius

For centre, an alternative way in (8)

Ross

I believe the answer is:

entrance

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'for' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?

'centre an alternative way in' is the wordplay.
'an' becomes 'a'.
'alternative' is an anagram indicator.
'way' becomes 'n' (Compass direction - North).
'in' is an insertion indicator.
'centre'+'a'='centrea'
'centrea' anagrammed gives 'etrance'.
'etrance' placed around 'n' is 'ENTRANCE'.

Can you help me to learn more?

(Other definitions for entrance that I've seen before include "Cast a spell on" , "seventeen [POSTERN], perhaps" , "transport" , "Way in - hypnotise" , "Capture" .)

I've seen this clue in The Daily Express.
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