dt cryptic 25,452

[catswhiskas]

really struggling with this today and would appreciate some help ,thanks.
1a puddle behind factory is a smooth area of water (8)
1dcertain people have done this (4+4)
12a fish in dirty places are unfeeling! (6)
2d bloodsucker found long flower (5)
4d turnip from northeast electroplated (4)
23a first lady with drink for bird (6)

[deepdale56]

1. millpond
2. made sure
3. steely
4. neep
5. evejar

[Ranjit]

1ac millpond
4d neep

[catswhiskas]

thankyou both very much can put this to bed now.

[devadolly]

2D Louse

[porilo]

I'd like to add my thanks too for 4d because I'd never heard of NEEP and that was the last one I needed to finish.

[tizzi2]

Can someone explain 12a ST Cryptic plaease = steely

[kettledrum]

12a eel = fish in sty = dirty place