Treating an allergy of the voice box (9)

I believe the answer is:

laryngeal

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'voice box' is the definition.
'laryngeal' can be an answer for 'voice' (thesaurus). I'm not sure about the 'box' bit.

'treating an allergy' is the wordplay.
'treating' indicates anagramming the letters.
'an'+'allergy'='anallergy'
'anallergy' anagrammed gives 'LARYNGEAL'.

'of the' acts as a link.

Can you help me to learn more?

(Other definitions for laryngeal that I've seen before include "Relating to the voice box" , "related to part of throat" , "Like part of air passage" , "affecting airway" , "in throat area" .)

I've seen this clue in The Daily Express.

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