Crossword Genius

Soldiers in camp - sorry, on manoeuvres (4,5)

Ross

I believe the answer is:

army corps

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'soldiers in' is the definition.
The definition suggests a singular noun which matches the answer.

'camp sorry on manoeuvres' is the wordplay.
'on manoeuvres' indicates an anagram (the letters manoeuvre into a new form).
'camp'+'sorry'='campsorry'
'campsorry' is an anagram of 'ARMY CORPS'.

Can you help me to learn more?

(Another definition for army corps that I've seen is " Military unit".)

I've seen this clue in The Globe and Mail.
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