Fruit in the liqueur Bargnolino (4)

I believe the answer is:

sloe

(Other definitions for sloe that I've seen before include "Fruit of the blackthorn does't sound fast" , "Musical study" , "Thorny bush with plum-like fruit" , "Wild plum" , "Fruit steeped in gin to make a liqueur" .)

I've seen this clue in the LA Times.

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