Work for money, say, in vessel (3)
I believe the answer is:
urn
'vessel' is the definition.
(urn is a type of container)
'work for money say' is the wordplay.
'work for money' becomes 'earn' (I've seen this before).
'say' shows a homophone (sound like).
'earn' sounds like 'URN'.
'in' acts as a link.
(Other definitions for urn that I've seen before include "Large ornamental vase" , "Vase-shaped vessel" , "Ornamental vessel" , "Pot, vase" , "Rounded vase" .)