Kitty spotted inside (3)
I believe the answer is:
pot
'kitty' is the definition.
(both can mean a shared fund)
'spotted inside' is the wordplay.
'inside' indicates the answer is hidden within the clue.
'POT' is hidden within 'spotted'.
(Other definitions for pot that I've seen before include "Street name for marijuana" , "Kitchen utensil or slang cannabis" , "Cylindrical container" , "Jar, cannabis" , "...Karenina(Tolstoy)" .)