He lets Pam manage in the partnership (9)

I believe the answer is:

helpmates

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

'in the partnership' is the definition.
I can't tell whether this definition defines the answer.

'he lets pam manage' is the wordplay.
'manage' indicates anagramming the letters (I've seen 'managed' mean this).
'lets'+'pam'='letspam'
'letspam' anagrammed gives 'lpmates'.
'he'+'lpmates'='HELPMATES'

Can you help me to learn more?

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

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