Pulverize, as peppercorns (5)
I believe the answer is:
grind
'pulverize as peppercorns' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for grind that I've seen before include "Crush, oppress; hard work" , "Suggestive dance -- reduce to fine particles" , "Pulverise" , "Pulverize" , "Jar" .)