Please help me to get started!!
1a) Stone a parish priest incarcerated in county (8)
5a) Thrust with this may be parried, backing off (6)
13a) Skeletal part old people put back in tomb (4,6)
18d) Contained fluid by tipping Lyon wine regularly (8)
Apology for having no letters
1a sapphire ('app' inside 'shire')
5a rapier (anagram of 'parried' without the 'd')
13a bone marrow ('barrow' around 'o' for old and 'men' backwards)
18d flyblown - 'fl' = fluid, 'by' upside down, 'lown' is odd letters of 'Lyon wine'