Possible Clues:

• Unwelcome character of slime on outside of stale fish egg
• Type of jam or pie
• Jam fruit
• Fruit used in jams
• See 12 Across
• Fruit Adam and Eve alone would not have appreciated?
• One unwelcome near passion fruit?
• Third-party fruit?
• Some intruders play it - it bears fruit
• Hairy fruit