Crossword Genius

Sorry camp constructed for a group of soldiers (4,5)

Ross

I believe the answer is:

army corps

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

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

'sorry camp constructed' is the wordplay.
'constructed' indicates anagramming the letters.
'sorry'+'camp'='sorrycamp'
'sorrycamp' is an anagram of 'ARMY CORPS'.

'for a' is the link.

Can you help me to learn more?

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

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