Cryptic crossword No 4,030

Across

1. Intially coach rebukes half-back for offences (6)
2. Stop the two running around in shopping centre (8)
3. Islander's first indication of spurning American grievance (6)
4. Somehow turn pier blue (8)
5. Place box over functioning signal and set on fire (11)
6. Opening old-fashioned dive (7)
7. Pub introduces cycling trial for Northeners (7)
8. Blow the chance of teacher getting the ferry, perhaps (4,3,4)
9. Vote for Republican after spin lends appeal (6)
10. Greater goodness, you might say, comes with rank (8)
11. Harmonious composer sets up band with Justin? (2,4)
12. Two points accepted about current student relating to settlement (8)

Down

1. Correspondent's 24 hours in Paris with new celebrity (10)
2. Foolishly I rent the quantity that allegedly costs fortunes (8)
3. What's responsible for growing profits? (4,4)
4. Writer hides group's commanding officer for protection (8)
5. In hindsight made gaffe imprisoning old people (4)
6. The first to leave after the emperor is held up (4)
7. Originally sergeant briefly left USA for Oman & UAE? (4,6)
8. Women hate using noisy gym (8)
9. Returned computers making a racket (4)
10. A boring, regularly failing standard (4)
11. Bit of French that's appreciated by the Italian (6)
12. Ruined soirée with extremely toxic secret (8)
13. Commission earned from old sovereign with the last lot of silver being seized (6)
14. More than one round, unusually dark rock formation (8)