Sun Tel Prize Cryptic Xword

[chokkie]

can someone give my brain a jog, please ...
12a regret American getting caught in fast time(6)
L?o?n? (or is the L incorrect?)
22a strike outside a corporation(6) ???n??
24a Part of America under control of Columbus(4) o?i?
25a: to run off with one partner is within the law(10)
?e?????a??
27a having bars, like well-known watering-holes(10)
?y?????t??

11d inferior example of its type, or real change in medicine (4,8) ?e?r ????????
20d: Astute and aggressive woman getting diamonds(6)
??????
23d like one's local, serving up hard drink(4) ????

Many thanks, any offers much appreciated.

[Lie-in King]

24a Ohio - Columbus is the state capital
27a Hyphenated - as 'well-known' & 'watering-holes'

[sedge47]

12a. lament
22a. p a unch

[sarumite]

20d Shrew d

[Lie-in King]

11d Poor relation - anag 'or real' (in) 'potion'

[sedge47]

25a. leg it i mate
23d. nig h

[Lie-in King]

23d Nigh - (up) h(ard) + gin

[Lie-in King]

Sorry sedge...

[chokkie]

That's fab, folks, thanks so much. Just one more,
13a Rowing at the stern - or fine in part of bow(8)
?t?o?ing (is it "stroking", can't see why, though).
M.

[sarumite]

Yes Str(ok)ing ... OK (fine) in string part of a bow

[Lie-in King]

Stroking - 'ok' (fine) (in) 'string' (on a bow)

[chokkie]

Thanks for all your help, that's it done now.

Cheers, M.