Crossword Genius

Dotty punctuation mark? (5)

Ross

I believe the answer is:

colon

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

This could be a double definition.

'dotty punctuation' is the first definition.
'colon' can be an answer for 'punctuation' (colon is a kind of punctuation). I'm not certain of the 'dotty' bit.

'mark?' is the second definition.
(colon is a kind of mark)

Can you help me to learn more?

(Other definitions for colon that I've seen before include "Costa Rican currency" , "Punctuate part of the large intestine" , "Punctuation mark; gut" , "Stop (less than full)" , "Start of one canal" .)

I've seen this clue in the Evening Standard.
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