Sponge or beg (5)
I believe the answer is:
cadge
I believe this clue is a double definition.
'sponge' is the first definition.
(I know that sponge can be written as cadge)
'beg' is the second definition.
(I know that cadge is a kind of beg)
(Other definitions for cadge that I've seen before include "beg" , "Try to get (something) without paying" , "Get by begging" , "Get money by sponging" , "Sponge (money, etc)" .)