Kitty in a puddle (4)
I believe the answer is:
pool
I believe this is a double definition.
'kitty' is the first definition.
('pool' can be a synonym of 'kitty')
'a puddle' is the second definition.
('pool' can be a synonym of 'puddle')
'in' acts as a link.
(Other definitions for pool that I've seen before include "Pond; table game" , "Small lake" , "Ball game - small body of water" , "17 - small stretch of water" , "Bellini opera" .)