Cryptic crossword No 4,007

Across

1. Do up hollow penny loafers - they're rarely seen like this (5)
2. Jumps ditches making shore of lake (5)
3. Uncovered cut floor (3)
4. American navy leaving certain Europeans viruses (5)
5. Online coffee shop has a remote-controlled caterer's first beefy brew (9)
6. Heist shown in article heading daily newspaper (5)
7. Opera song to conclude goes back to girl in Greek mythology (7)
8. Half-cut tart I had loudly (3-4)
9. Pressuring the Crown of Spain to promote embezzler, essentially taking the role of knight in government (9)
10. Protégé is ebulliently guarding overturned blockade (7)
11. One French disease can reportedly become airborne sight? (7)
12. Essential scrap of polyester stitched together with funny outfit (5)
13. Cougar sat with firm piece of salmon changing places to make sweet (5-4)
14. Utterly defeat champion winning dull TV set every second (9)
15. Australian rubbish collector has fish odour (5)
16. Small screens and roof lost off off-road vehicles (3)
17. Scraps he had stored in ship (5)
18. Tense questions create problems (5)

Down

1. Fish species, a squealing one (5)
2. Revolutionary glitz of frequent occasions made sharp change in movement (3)
3. They're quite sharp to pull question up with precision (9,6)
4. Fly over the Queen's protective walls to deliver documents (7)
5. Two bees caught upside down weaken (3)
6. Roswell met a RAF engineer following a war story (1,8,2,4)
7. Demon, when leaving priest, gets to go for the doctor (5)
8. Exchange cops money - it's a dirty area to be dealing in (5)
9. Slimy mess in toilet sent up (3)
10. Tailored shirts get patches (4,5)
11. Outsiders exiling outsiders out (5)
12. They start to jive inside parties scratching disc (3)
13. The state of the past to have only the sun left in Alien? (5)
14. Quiet nerds ignoring good peers (5)
15. Essential aspect of sin in the matter of wrath (3)
16. Consents given by every third character to blow a kiss (3)
17. Larvae of mites with fingers (7)
18. The 10th year with holiday breaks from a department approval (9)