Big Monday Express Crossword

[Beatrice35]

Please help me with the following stuck on. Many thanks in advance ;-)
13 Across) Buying and selling of goods and services, especially on a large scale (5) B?M??R?E
Is 9 Down) Prebendor?
32 Across) Hymn for the dead whose name means Day Of Wrath in Latin(4,4)
19 Down) Nickname of Mary Elizabeth Gore, wife of Nobel Laureate Al (6)

Many thanks ;-)

[tyrepill]

19d Tipper Gore

[Catron]

13a - commerce?

[tyrepill]

32a Dies Irae

[dundurn]

Are you sure about the B at the start of 13a - could be commerce

32a dies irae

[daniela31]

commerce
precent
dies irae
tipper

[baitress]

13a - commerce.
9d - precentor.
32a - dies irae.
19d - tipper

[Beatrice35]

Bless you Baitress + everyone here who posted an answer for me- thank you all- much appreciated!! ;-)
Was stuck on 9 down- with the answer as precentor, it makes perfect sense now that the answer was commerce! Oh my gosh, what a silly goose me! Thanks once again- you all were a great help- Baitress especially!
Warm wishes, Beatrice35 :-)