Spotted with Kitty (3)
I believe the answer is:
pot
'kitty' is the definition.
(both can mean a shared fund)
'spotted with' is the wordplay.
'with' says the answer is hidden in the clue.
'POT' can be found hidden inside 'spotted'.
(Other definitions for pot that I've seen before include "Preserve; drug" , "prize" , "Somewhere to go" , "Street name for cannabis" , "Grass" .)