Women's collar is a bit rent (7)

I believe the answer is:

partlet

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

'women's collar' is the definition.
I can't judge whether this defines the answer.

'bit rent' is the wordplay.
'bit' becomes 'part' (both can mean a piece of something).
'rent' becomes 'let' (I've seen this in another clue).
'part'+'let'='PARTLET'

'is a' is the link.

Can you help me to learn more?

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

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