Familiar name for a copper-coloured maiden (5)

I believe the answer is:

penny

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

'familiar name' is the definition.
'Penny' can be an answer for 'name'. I am unsure of the 'familiar' bit.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for penny that I've seen before include "Girl" , "Small unit of currency" , "One hundredth of a pound" , "Coin - girl's name" , "Bronze coin" .)

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