ft cryptic

[classicalgal]

Last 4 and I'm stumped. Any guidance gratefully received.
1d Fold or go bust with red ace? (3-3) d?g-?a? dog-tag? but why?
14a V-sign changes (6) ?a?i?s possibly matins or basics but no idea why?
16a German bread tax introduced by senator (7) s?o?l?n swollen fits but why?
22d Child upset by shoddy articles in arbitrary order(6) ?i?t?t

Thank you in anticipation.

[antonove]

16 a is stollen

[Lie-in King]

1d Dog-ear - anag 'go + red a(ce)'
14a V-Aries
16a Stollen (bread) - 'toll' (in) 'Sen(ator)'
22d Diktat - 'kid' (upset) + 'tat'

[Sandy-Wroe]

22d Dictat?

[classicalgal]

Thank you all, antonove, Sandy-Wroe but especially Lie-in King! I feel very humbled by the erudition of the last named. I should have tried harder. Thank you for your patience one and all with those of us still learning. x