Fresh pineapple contains substances which affect fermentation adversely.
Producing off flavours
Therefore pineapple wine is normally made from the outer rinds of the fruit,Its also where the most flavour is concentrated.
Plus you get to eat all that lovely pineapple.
A typical gallon of pineapple wine should contain the rinds of AT LEAST 1 large or 2 medium pineapples.
The rest of the juice will need to come from another fruit.(apples)
All this only applies to FRESH pineapple.
As regards processed fruit or juice there should not be any problems.
There are Two main reasons why wine wont clear they are:-
(1) pectin
(2) starch
Both can be dealt with by (1) pectolase (2) amylase.
Do try using the fresh fruit its much better.