Usual line taken by operatic woman (6)

I believe the answer is:

normal

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'usual' is the definition.
(I've seen this before)

'line taken by operatic woman' is the wordplay.
'line' becomes 'l'.
'taken by' is a charade indicator (letters next to each other).
'operatic woman' becomes 'norma' (I am not sure about the 'operatic' bit.).
'l' after 'norma' is 'NORMAL'.

Can you help me to learn more?

(Other definitions for normal that I've seen before include "Ordinary, usual" , "Usual, not extraordinary" , "Common" , "Ordinary, not unusual" , "Popular" .)

I've seen this clue in The Telegraph.

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