Sponge (5)
I believe the answer is:
cadge
'sponge' is the definition.
(I know that sponge can be written as cadge)
This is the entire clue.
(Other definitions for cadge that I've seen before include "Try to borrow" , "Scrounge, sponge" , "Sponge (money, etc)" , "get free" , "freeload" .)