Local Crossword - Thank You In Advance

[grahamr888]

1. Slow burner starts to wane - it's common knowledge (4) ?I??
2. Joint status is a non-starter with the French (5) A????
3. Go back topless and find a way out (6) ?G???S
4. Island in America beyond another lost city (2,5) S?, L?U?S

[vakayu]

3 egress

[mallyh]

4 st louis

[FrogNog]

4. St Louis

[vakayu]

4 /St Louis

[FrogNog]

2 ankle?

[FrogNog]

yes ankle
(r)ank le

[mac44]

2. (r)ank le.

[Lie-in King]

1 Wick - starts of 'w(ane) i(ts) c(ommon) k(nowledge)'
2 (r)Ank-le
3 (r)Egress
4 St Louis - anag 'lost' + 'i(sland)' (in) 'US'

[kettledrum]

2 (r)ank + le

[grahamr888]

Thank you all for your help, it is much appreciated :)