Crossword Genius

Fruit from two different trees (9)

Ross

I believe the answer is:

pineapple

I'm a little stuck... Click here to teach me more about this clue!

'fruit' is the definition.
(I know that Pineapple is a fruit)

'two different trees' is the wordplay.
I cannot really understand how this works, but
'trees' could be 'pine' and 'pine' is found in the answer.
The remaining letters 'apple' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

'from' acts as a link.

Can you help me to learn more?

(Other definitions for pineapple that I've seen before include "bomb" , "One may go off" , "Juicy tropical fruit or slang hand grenade" , "that might go off?" , "Large juicy tropical fruit, or a grenade" .)

I've seen this clue in The Telegraph.
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