One after the other (2,1,3)
'one after the other' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for in a row that I've seen before include "running" , "Forming a line" , "Like all the pretty maids" , "successively" , "Lined up" .)
(Other definitions for casanova that I've seen before include "18th century Italian lover" , "Man with reputation as lover of many women" , "Man noted for his amorous adventures" , "Rake" , "Notorious seducer" .)
'one after the other' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for in turn that I've seen before include "a succession of things happen" , "in an orderly fashion" , "not out of place" , "One after another" , "orderly treatment" .)