Cryptic crossword No 4,128

Across

1. Dismissal from town near the Tees delta (3,4)
2. What about river, with regard to this bird? (5)
3. Part of speech, on reflection (4)
4. Extraordinary rendition beginning to appear excessive (10)
5. Good Samaritan's first pianos (8)
6. Swung both ways? Hot stuff! (6)
7. Bend-sinister (4)
8. Institute advertised on the radio (5)
9. Sign of ladies losing weight (4)
10. Most of discharge - foreign matter turns rotten (6)
11. Sadly rely on present watering-hole (8)
12. Looked down at iPad notes, with third of paragraphs needing revision (10)
13. Retro virus wiping out a part of the ear (4)
14. Deliver routine with nothing missing (5)
15. Moving Renault probably isn't in this (7)

Down

1. Go up in smoke, like a Transit? (6)
2. Discovered fodder, pulled up a root vegetable (4)
3. Trailed commercial which presented houses (8)
4. Decrease effect, essentially? (4)
5. Run, speed up, and go over (5)
6. Significant number put forward (7)
7. Fancy supporting supermodel's introduction in Vogue? (5)
8. One denouncing rampant hedonism in topless bar (10)
9. Running amok with laser beam, in the end finding safety device (5,5)
10. Rubbish hotel in difficulty - support withdrawn (7)
11. Wordplay's poor - I worry over clue's ending (8)
12. Origin of singer's intense dislike for metal (6)
13. Revolutionary dance incorporating hint of bhangra (5)
14. Feature of climate control, so it's said (4)
15. Nets finally put on goal post (4)