Green’s Dictionary of Slang

stroke n.2

1. [19C+] (UK Und./police) an action considered audacious or daring; sometimes criminal activity.

2. [1920s] (US) a monopoly; rights to do something.

In derivatives

stroker (n.)

[1990s+] (Irish) a criminal, a trickster.

In phrases

pull (off) a stroke (v.) [SE stroke, ‘a vigorous attempt to gain or do something’ (OED); a suggested link with rowing strokes seems implausible]

[1910s+] to attempt and/or get away with anything outrageous or daring.