Very worried. (a) Had visitors, so concentration low, and (b) don't want to get told off if someone else has asked about these last two clues...
21d Surrounded by endless bog, mountain appears in the clouds (3,3) -I-/A-R
39a See man at the top making mistake at work (6) B-S-O-.
In the down clue, I assume the second word is 'air', and endless bog is probably MARS or something?
The across one, BISHOP for 'man at the top' or BESPOT for 'see'.
Any thoughts?