One who steals something from the pot? (3,4)
I believe the answer is:
tea leaf
I believe this clue is a double definition.
'one who steals' is the first definition.
(Cockney rhyming slang for 'thief')
'something from the pot?' is the second definition.
(something from a teapot)
(Other definitions for tea leaf that I've seen before include "one exhibiting a fortune?" , "One from Assam perhaps" , "one of many going to pot?" , "Beat; sell" , "ending up in hot water" .)