Cryptic crossword No 3,982

Across

1. Charger strength is 746 watts (10)
2. Flog and maybe Lynch ships leader in London (4)
3. What gets Gary going - fried steak and a joint (6)
4. Tom returns with Oscar to mix up some lube! (5,3)
5. Victor swerves evening out to find a motor (6)
6. Supports Truss being sacked over budget at last (6)
7. Best friend Charlie joins naked romp with priest (8)
8. Pay back vegan mistakenly given slice of entrecôte (6)
9. Initially straining excessively before laxative essentially produces a stool (4)
10. Head of Avanti Rail quit over unknown pollution measure (3,7)
11. Small fat bird Beryl stripped - hint of erection for Barney (8)
12. Late PMs flat in outskirts of Galashiels (8)
13. Advantages and disadvantages of Dnipro sand conservation (4,3,4)

Down

1. Trapped crook with ecstasy and bit of dope (8)
2. Extremely short dresses for flashers (7)
3. Tramps just about get car going (4,6)
4. Fleet returns perhaps from crusades abroad (4,4)
5. Japanese carmaker not cutting runabouts production (6)
6. Fit beer bottles opener for bar (4)
7. A Turner is with Les Greene getting drunk (8,5)
8. Portable sulphur lamps (6)
9. Dock on west side of Beringia reef perhaps provides link between continents (4,6)
10. Pot rolling in Low Country (6)
11. Tips from pupil using converted hybrid vehicles (4-3)
12. Fuel sample from Dieppe trolleybus (6)
13. Boss has sex on the counter (4)