Pack maybe last bit of mango into pastry dish (5)
I believe the answer is:
tarot
'pack' is the definition.
(type of card pack)
'last bit of mango into pastry dish' is the wordplay.
'last bit of' says to take the final letters.
'into' means one lot of letters goes inside another.
'pastry dish' becomes 'tart' (type of pastry product).
The final letter of 'mango' is 'o'.
'o' going into 'tart' is 'TAROT'.
'maybe' is the link.
(Other definitions for tarot that I've seen before include "Arcana cards" , "Fortune-teller's card" , "Playing cards" , "These cards are used to tell fortunes" , "One in special suit" .)