Chutney fruit (4)
'chutney fruit' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for mango that I've seen before include "Fruit, often in chutney" , "Large oval tropical fruit" , "Once exotic fruit" , "Yellow-fleshed fruit" , "fruit-tree" .)
(Other definitions for plum that I've seen before include "murderer" , "excellent?" , "Damson-like fruit" , "Dark reddish-purple colour: especially valued" , "Shade" .)