I think they are all OK, but am willing to be told different ;-)

Across:
1 catch one napping  9 uppermost  10 befog  11 basic  12 architect
13 external  14 powder  16 calash  18 tornadic  22 introduce
23 run in  24 notch  25 roadhouse  26 instrument panel.

Down:
1 crumble  2 typeset  3 herb-christopher  4 neonatal  5 notice
6 public ownership  7 infield  8 gagster  15 forewarn  16 chianti
17 litotes  19 Don Juan  20 conceal  21 quorum.

Graham

-- 
GRENMUS
       grenmusHAM@HAMargonet.co.uk
       Have a HAM sandwich before you reply ;-)  
       G Sumner Ormskirk