Strange plea associated with introduction of passion fruit (5)
I believe the answer is:
apple
'fruit' is the definition.
(apple is a kind of fruit)
'strange plea associated with introduction of passion' is the wordplay.
'strange' indicates anagramming the letters.
'associated with' means one lot of letters go next to another.
'introduction of' suggests taking the first letters.
The initial letter of 'passion' is 'p'.
'plea' after 'p' is 'pplea'.
'pplea' with letters rearranged gives 'APPLE'.
(Other definitions for apple that I've seen before include "Adam had one!" , "Firm round fruit" , "Fruit that keeps doctor away?" , "Beneficiary of 23 [LOVELACE]" , "Pink Lady, for example" .)