Polka ___ (4)
(Other definitions for dots that I've seen before include "Short signals in Morse cods" , "Tiny circular shapes" , "Shorter signals in the Morse code" , "Tiny spots" , "Tiny circles" .)
(Other definitions for dot that I've seen before include "Speck or period" , "Tiny speck" , "Spot, speck" , "Cotton, say" , "Full stop, period or tittle" .)