Crossword Genius

Swallow cocktail the second one's left (6)

Ross

I believe the answer is:

martin

'swallow' is the definition.
(I know that martin is a type of swallow)

I don't understand the rest of the clue.

(Other definitions for martin that I've seen before include "Creature that flies" , "Dickens novel featuring Mr Pecksniff" , "Male name, bird" , "Variety of swallow" , "Bird of the swallow family" .)

I've seen this clue in The Guardian.
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