Purple fruit (4)
'purple fruit' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sloe that I've seen before include "Sour blackthorn fruit" , "Fruit of the blackthorn does't sound fast" , "Fruit often used for gin" , "Sour blue-black fruit" , "Blackthorn, used in making a type of gin" .)
'purple fruit' is the definition.
(plums can be purple)
This is the entire clue.
(Other definitions for plum that I've seen before include "Dark bluish-red - fruit" , "Dark purple" , "Reddish-purple fruit" , "Fruit; something choice" , "Dark-red fruit" .)