Local Paper

[Jaimsieboy]

21 Across - Lacks bite (7) S?a????
16 Down - Dog-star (6) ?a??e?
23 Across - Uncalled for correspondence (4,6) ?e?? Letter
20 Down - A classical author I'd nothing against at first (4) (Sorry no letters)

[boxtops]

23 left letter ? (letter left at the PO, not collected?)

[boxtops]

20 OVID (latin author?)

[grasscarp]

23 left letter

[Oldred]

dead letter ?

[scorpiojo]

Are your letters correct for 16 Jb? Not Sirius?

[boxtops]

Dead letter sounds better

[Oldred]

21a starves ?

[Jaimsieboy]

Update on Clues :
16 Down - Dog-star (6) Lassie is the answer
4 Down - Upright letters (4) P?s?

[dannyk13]

4d.Post?

[Oldred]

4d post

[scorpiojo]

Post

[Mamyalynne]

Post

[bluemoon1]

4d post

[Jaimsieboy]

Thanks to all, POST lookslike the answer (bit vague) - J/Boy

[scorpiojo]

Lol

[Mamyalynne]

post1
pəʊst/Submit
noun
1.
a long, sturdy piece of timber or metal set upright in the ground and used as a support or marker.
synonyms: pole, stake, upright, shaft, prop, support, picket, strut, pillar, pale, paling, column, piling, standard, stanchion, pylon, stave, rod, newel, baluster, jamb, bollard, mast; More

[Mamyalynne]

Not vague really.