Crossword Genius

Whets the appetite for investments (9)

Ross

I believe the answer is:

interests

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

'investments' is the definition.
The answer and definition can be both acts as well as being plural nouns.
Perhaps there's an association between them I don't understand?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for interests that I've seen before include "Hobbies or preoccupations" , "Involvements, pastimes" , "Pursuits of triteness" , "Advantages" , "Appeals, fascinates" .)

I've seen this clue in the Sydney Morning Herald.
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