Green’s Dictionary of Slang

1. (Aus.) a stone [? one plucks it from the ground].

1959

Baker Drum.

2. (US black) wine, esp. cheap wine [? SE pluck, to harvest grapes].

1967		J. Horton ‘Time and cool people’ in Trans-action 4 8/1: The dudes ‘rap’ and ‘jive’ (talk), gamble and drink their ‘pluck’ (usually a cheap, sweet wine).
1969		H. Rap Brown Die Nigger Die! 24: We went and got some ‘pluck’ (wine) and I told him I was in college.
1970		A. Young Snakes (1971) 29: ‘Fellas [...] it aint nothin like that pluck to snatch you in place.’ Pluck was wine, usually Bird, Thunderbird.
1972		O. Hawkins Ghetto Sketches 81: What about China? I missed that runnin’ to get the pluck.
1980		E. Folb Runnin’ Down Some Lines 175: Gimme some reds! Gimme some weed! Gimme some pluck! Now da’s a nice high.

3. (US black) an attractive woman [she is ‘plucked’ from the bunch; or ? ref. to fig. use of SE pluck, offal, i.e. the vagina].

1980

E. Folb Runnin’ Down Some Lines 152: Pluck refers to an attractive female.