Knows main female relation (9)

I believe the answer is:

kinswoman

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'relation' is the definition.
(I know that kinswoman is a type of relation)

'knows main female' is the wordplay.
'knows main' can be anagrammed to 'KINSWOMAN'.
Though, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for kinswoman that I've seen before include "Female relative" , "one of the family!" , "Female family member" , "Relation" .)

I've seen this clue in The Irish Independent.

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