Sunday World Cryptic

[Bernie]

13a show off (2,11) no pe?????an?e
17d drawing an unloaded vehicle(7) ????o?n
8d Business may be started with it (6)?u?r??
15d keep it rude perhaps (6)??i?
Many thanks

[fiction-factory]

can you repost the pattern for 15d please

[Bernie]

15d ??d?i?
Sorry about that

[gangesboy]

15 reduit - anag of it rude

[scorpiojo]

Do performance??

[gangesboy]

...a keep in a castle/fort

[scorpiojo]

17 Cart o on

[Bernie]

Do performance looks good but now I am wrong with 13d
unusual thing that is worn by ladies in retirement. I had nighties?. Would no performance be wrong

[scorpiojo]

What letter does nighties add to show off, Bernie?

[fiction-factory]

nightie looks good for that (anagram)- not sure where the S comes from though

[fiction-factory]

..I took it that the Nighties gives the n in No

[scorpiojo]

8 Quorum?

[Bernie]

Yes nighties would give me no performance which sounds like the opposite to show off