C3L1E1R1K5
11 points
CLERK is validvalid
to serve as an office worker [v CLERKED, CLERKING, CLERKS]
to serve as an office worker [v -ED, -ING, -S]
to serve as an office worker [v CLERKED, CLERKING, CLERKS]
to serve as an office worker [v -ED, -ING, -S]