Get by begging (5)
I believe the answer is:
cadge
'get by begging' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for cadge that I've seen before include "get free" , "Scrounge, sponge" , "beg" , "Caged (anag.)" , "Sponge (eg money)" .)