Camp man who’s good with a contrary girl (6)

I believe the answer is:

stalag

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'camp man' is the definition.
'stalag' can be an answer for 'camp' (German prison camp in World War 2). I'm unsure of the 'man' bit.

'good with a contrary girl' is the wordplay.
'good with' becomes 'lats' (I can't explain this - if you can you should believe this answer much more).
'a contrary' shows that the letters should be reversed in order.
'girl' becomes 'Ag'.
'lats' backwards is 'stal'.
'stal'+'ag'='STALAG'

'who's' acts as a link.

Can you help me to learn more?

(Other definitions for stalag that I've seen before include "German camp for POWs" , "German World War two prison camp" , "German concentration camp" , "German prison camp in WW2" , "Water at the mouth" .)

I've seen this clue in The Sunday Times.

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