Cryptic crossword No 3,096

Across

1. Different men's clothing article (5)
2. Beast from Africa, a huge gorilla, filmed on safari at last (7)
3. I'm no intellectual – I love dipping into One Day and Starter for Ten (5)
4. Bottom of river mucky ... removing coat, plunge right in! (6)
5. More than one lied, perhaps, about government's issue (5)
6. Somehow force user to run Internet Explorer? (6)
7. One smuggling diamonds for money, £500 (6)
8. Beginning to scribble a note, pressing with pen? (4)
9. See 5d
10. See 5d
11. American's after second helpings of fab Sunday joint, served in its own gravy (2,3)
12. Book fair's abandoned, ultimately, by celebrated British novelist (4)
13. Carry On Cleo, vacuous and extremely puerile (4)
14. Old safety device is helpful (2,3)
15. Weak-willed type is giving up independence to go back on heroin (5)
16. Measure of distance to sun (3)
17. Visitor about to go in the Louvre (6)
18. Lad from South Norwood originally (3)

Down

1. He's given tips to young journalist on Evening Standard (3,3)
2. Jade's new record essentially underperforming, entering hit parade at no. 6 (8)
3. Bloke almost 50 being taken for 34 maybe (3)
4. Composer's boring dodgy retro music? (7)
5. Maybe Denny's service assistant nonchalantly disregards you at first (5)
6. Rising star for Liverpool needing hospital, unfortunately (4)
7. Reportedly cut investment (5)
8. Parched, drinking cloudy bitter (5)
9. Restraining large dog that's usually on a lead (4)
10. Enjoys Hot Wings occasionally (4)
11. Deep sea fish (4)
12. Is able to record in advance (3)
13. Sporting giant from Peking turned up (4)
14. Corrupt English politician: "Nothing is working!" (8)
15. Northern Irish settler finally thrown in cell (6)
16. Told to congregate inside (4)
17. Raw avocado? (5)
18. Fine end to Friday after bar doesn't close (5)
19. Australian needs to play with fire, others take a cautious approach (3,2,3,4,4)
20. Harsh as Scottish team left out (7)