Bond keeps me in cash (6)
I believe the answer is:
cement
'bond' is the definition.
(cement can mean to stick or bond)
'me in cash' is the wordplay.
'in' means one lot of letters goes inside another.
'cash' becomes 'cent'.
'me' going into 'cent' is 'CEMENT'.
'keeps' acts as a link.
(Other definitions for cement that I've seen before include "Powder used to make concrete" , "Stuff that binds or bonds" , "Bond firmly" , "Bind firmly" , "Ingredient in mortar" .)