Crossword Genius

Daughter and mum given radium injection in theatre (5)

Ross

I believe the answer is:

drama

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

'in theatre' is the definition.
(I know that drama is part of theatre)

'daughter and mum given radium injection' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'and' is a charade indicator (letters next to each other).
'mum' becomes 'ma' (ma can mean mother).
'given radium' becomes 'ra' (Ra is the chemical symbol for radium. I am not sure about the 'given' bit.).
'injection' is an insertion indicator.
'd'+'ma'='dma'
'dma' going around 'ra' is 'DRAMA'.

Can you help me to learn more?

(Other definitions for drama that I've seen before include "Literary genre for the stage" , "theatre performance" , "Stage production" , "Theatrical production" , "Play - crisis" .)

I've seen this clue in The Independent.
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