Male cop I now exchanged for female cop (11)

I believe the answer is:

policewoman

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'cop' is the definition.
(I know that cop can be written as policewoman)

'male cop i now exchanged' is the wordplay.
'exchanged' is an anagram indicator.
'male'+'cop'+'i'+'now'='malecopinow'
'malecopinow' is an anagram of 'POLICEWOMAN'.

'for female' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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