What a scrounger may do to get cake (6)
I believe the answer is:
sponge
'cake' is the definition.
(sponge cake is a kind of cake)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for sponge that I've seen before include "Piece of porous rubber" , "Porous substance to soak up" , "Porous mass of fibres found in the ocean" , "Porous mass in oceans" , "No pegs on this substance to soak up" .)