/Cryptic down to last 7 or 8 clues! May I have yes or no answers to the following, please?
12 down: I will leave Russian front (3) Letters: V - -
Answer VAN
16 down: Baker upset after cancelled delivery (3,5)
Letters: - - G - R - A - -Answer LEG BREAK
17 down: Jo prayed about hazard (

Answer: JEOPARDY
All this means that the L (from LEG) the N (from VAN) and the J (from Jeopardy) appear as follows:
- L N J - C - U - E -
The clue for which is: :
15 across: /supposed to have done some magic round European court (11)
No hint requested but if one or some of letters wrong, it would certainly help to know which ones.
Thank you.