Can you help?
13a Old article about a British port (4) ???n
21a Silly jokes about parking in 3s capital (6) ?????e
14d Prevent someone from joining dismal dance (9) ??a?????l
Many thanks
It looks from your clue as though the answer to 3 (across or down) might be the name of a country, region, etc? If so, its capital is possibly the answer to 21a.
...And as I've typed that, I can see -
Skopje - anag 'jokes' (about) p(arking) - capital of Former Yugoslav Republic of Macedonia