sat times 737 cryptic

[meabby]

18 ac Bright as this? (5) B?A?N - ?brain but why
22 ac Action I , in other case must have for completion ( 7 ) D?T?ING

35 ac Fighting force with veteran in second line (8) SOLDIER? (is the last letter s or y - ?why)

48 ac Sank inposition following low grade (5) ???K

55 ac Rock one sailor passed back to another (6) ????LE

34 down Provision for personal communication in militia? (8,4) ?A?I?E?S?A?D

40d the hieght of inspiration for a poet (9) P?R???S??
48 Protestant action by bishop put out of service (5) ??M??

thanks

[dxhound2003]

22 Dotting as in dotting your i's and crossing your t's, Lower case i.

35 Soldiery OLDIE in S second RY railway (line)

[dxhound2003]

48 Demob

18 is probably derived from "As right as rain"
As (b)right as (b)rain

[meabby]

thanks

[kettledrum]

40d Parnassus

[greyfox]

34dn. I think is CITIZEN'S BAND so your first 'A' is wrong
48 DEMO(Protestant action)B(ishop)

[Ulzana]

48ac looks like DRANK. D - low grade and RANK - position
55ac is BASALT. BA - AB back and SALT is another sailor