There is a total of 41 clues beginning with w-
- W--THL-SS R-AD-TER
- W-2 agcy
- W-2 amount perhaps
- W-2 collector
- W-2 data
- W-2 datum
- W-2 datum: Abbr
- W-2 digits: Abbr
- W-2 fig
- W-2 figure
- W-2 form abbr
- W-2 ID
- W-2 IDs
- W-2 inclusion
- W-2 info
- W-2 info (abbr)
- W-2 info
- W-2 info: Abbr
- W-2 information
- W-2 issuing agcy
- W-2 org
- W-2 pro
- W-2 publisher, briefly
- W-2 receiver
- W-2, eg
- W-2s et al
- W-4 collector, for short
- W-4 datum: Abbr
- W-4 entry: Abbr
- W-4 fig
- W-4 info: Abbr
- W-9 distributor: Abbr
- W-9 fields: Abbr
- W-9 filers
- W-9 ID
- W-9 IDs
- W-9 info
- W-9 or W-2 ID
- W-O-N-S?
- W-X-Y-Z for an encyclopedia, maybe: Abbr
- W-Z, eg, in an encyc