Cryptic crossword No 4,101

Across

1. Possibly the best actor, regularly has inspired - we recalled on, primarily, Star Trek craft (7,7)
2. See 1a
3. Bespoke tradition (6)
4. Potential military command barked affirmatives in the past 15 (4,4)
5. Once everything's shifted four steps back, I've some time (3)
6. Mutant professor's right to follow by a fight (6)
7. Sleeps on banks of Great Lake in household linens (8)
8. 9's the avenue to depart (5)
9. One of nucleic domain? Nonsensical, take your tablet! (9)
10. Enterprises in Star Trek, say, feature second in show's premiere (9)
11. Inhuman space explorer for beryllium (5)
12. No Kings? On out! (8)
13. One with no filling in the capacity of seed (6)
14. Wife in good condition, starting late with substantial assets? (7)
15. Algerian pirate vessels, prize beck sailing in some measure (7)
16. Concealed by iconoclast, lynched after all (6)
17. A Georgia range (3)
18. Rest in peace behind good man that is originally remembered having more lines (8)

Down

1. Captain 1 5 played fantastically cold, jural and epic (4-3,6)
2. Temporary use under either end of Yakutsk's 1 5's birthplace (9)
3. Issue is hot like a tot? (8)
4. At the tops on stage house? (7)
5. Fixed beef pad, mostly secure (7)
6. It's inscribed in memoriam and describes teeth? (6)
7. I rule in Oblivion? (5)
8. A grown-up hugs everyone initially to give obsequious flattery (7)
9. One comes back with what's shot on tour, after vacation I tear through with top off (9)
10. One shoots what's come back in time on right area (6)
11. Consider cryptic instruction, for example, to make pots stop? (7)
12. Dramatic European nation where AI makes a comeback, undermining article? (8)
13. Australian saddle horse with a liter it has left? (5)