| Letter between whiskey and foxtrot, maybe | 41 |
| Letter bomb? | 12 |
| Letter box deposits | 19 |
| Letter buddy | 12 |
| Letter by Paul | 14 |
| Letter carrier | 14 |
| Letter carrier in Manchester | 28 |
| Letter carrier's area | 25 |
| Letter carrier's assignment | 31 |
| Letter carrier's assignment: Abbr. | 38 |
| Letter carrier's beat | 25 |
| Letter carrier's burden | 27 |
| Letter carrier's org. | 25 |
| Letter carrier's tote | 25 |
| Letter carrier's uniform? | 29 |
| Letter carrier"s burden | 28 |
| Letter carrier: Abbr. | 21 |
| Letter carrier?: Abbr. | 22 |
| Letter carriers | 15 |
| Letter carriers (abbr.) | 23 |
| Letter carriers in "Harry Potter" | 43 |
| Letter carriers' assignments | 32 |
| Letter carriers' gp. | 24 |
| Letter carriers' grp. | 25 |
| Letter carriers' org. | 25 |
| Letter check, often: Abbr. | 26 |
| Letter closer | 13 |
| Letter closer of yore | 21 |
| Letter closer, perhaps | 22 |
| Letter closer: Abbr. | 20 |
| Letter closers | 14 |
| Letter closers? | 15 |
| Letter closing | 14 |
| Letter closure | 14 |
| Letter closure: abbr. | 21 |
| Letter codes | 12 |
| Letter color | 12 |
| Letter container | 16 |
| Letter container: Abbr. | 23 |
| Letter covering: Abbr. | 22 |
| Letter ctr. | 11 |
| Letter decoration | 17 |
| Letter decoration on a canvas? | 30 |
| Letter delivery grp. | 20 |
| Letter design | 13 |
| Letter digits | 13 |
| Letter directive (abbr.) | 24 |
| Letter distribution on base | 27 |
| Letter drop | 11 |
| Letter drop site (abbr.) | 24 |
| Letter drop, e.g. | 17 |
| Letter drop-offs | 16 |
| Letter earner | 13 |
| Letter earners | 14 |
| Letter embellishment | 20 |
| Letter enc. | 11 |
| Letter enc., maybe | 18 |
| Letter encl. | 12 |
| Letter encl. to facilitate a reply | 34 |
| Letter enclosure (abbr.) | 24 |
| Letter enclosures (abbr.) | 25 |
| Letter enclosures: Abbr. | 24 |
| Letter encls. | 13 |
| Letter ender | 12 |
| Letter ender, perhaps | 21 |
| Letter ender? | 13 |
| Letter ending | 13 |
| Letter ending for some notes | 28 |
| Letter endings: Abbr. | 21 |
| Letter enhancement | 18 |
| Letter entry | 12 |
| Letter expert | 13 |
| Letter experts | 14 |
| Letter extender | 15 |
| Letter F, in Spain | 18 |
| Letter famed for its size | 25 |
| Letter fancifier | 16 |
| Letter farthest from alpha | 26 |
| Letter feature | 14 |
| Letter finisher | 15 |
| Letter finisher, of sorts | 25 |
| Letter flourish | 15 |
| Letter following ex | 19 |
| Letter following sigma | 22 |
| Letter following zeta | 21 |
| Letter for a gaggle | 19 |
| Letter for a scholar? | 21 |
| Letter for Churchill | 20 |
| Letter for Cynewulf | 19 |
| Letter for Gandalf | 18 |
| Letter for Homer | 16 |
| Letter for letter | 17 |
| Letter for Moses | 16 |
| Letter for Reeve or Reeves | 26 |
| Letter for Sappho | 17 |
| Letter for Superman | 19 |
| Letter for which a curve is named | 33 |
| Letter for Yanni | 16 |
| Letter form? | 12 |
| Letter four after omicron | 25 |