Staff grabbing rupees fast (6)
I believe the answer is:
starve
'fast' is the definition.
(I've seen this before)
'staff grabbing rupees' is the wordplay.
'staff' becomes 'stave' (synonyms).
'grabbing' indicates putting letters inside.
'rupees' becomes 'r' (abbreviation for rupees).
'stave' going around 'r' is 'STARVE'.
(Other definitions for starve that I've seen before include "Without wishing, fast" , "Stop feeding" , "Die of hunger" , "Averts (anag)" , "Fail to take in" .)