A woman who is always dressed to attract attention from potential partners/ one nighters. Can also apply to a woman who's great at picking up in a club or wherever she happens to be. Clicky (as in knows what she's doing/ how to get what she wants) and Knickers (referring to the Aus/ Brit slang word for womens underwear).
"She's clicky knickers'' or (as a nick name) ''Hey Clicky Knickers!''..