Soldiers roar and sing wildly (8)

I believe the answer is:

garrison

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'soldiers roar and sing wildly' is the definition.
I can't judge whether this definition defines the answer.

'roar and sing wildly' is the wordplay.
'and' means one lot of letters go next to another.
'wildly' indicates anagramming the letters.
'roar' after 'sing' is 'singroar'.
'singroar' anagrammed gives 'GARRISON'.

Can you help me to learn more?

(Other definitions for garrison that I've seen before include "Body of troops guarding a stronghold" , "Fortified military post" , "HQ" , "Provide (place) with troops for defence" , "Military stronghold" .)

I've seen this clue in The Guardian and The Sun.

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