Cryptic crossword No 4,023

Across

1. In hindsight imagine dragonfly guarding weed (6)
2. Talks boastfully about naked diva's genitalia (8)
3. Forgetful old boy facing fifty-four promissory notes (9)
4. Conservationist reduced energy for cooking (5)
5. Misconceived relaunch not hard core (7)
6. Pretty affected, inspired by Caledonian hill in middle of... (7)
7. ...endless vista, hides photograph at last in waistband (4)
8. Lysander's slave binding first person with cord of lilac-blue colour (10)
9. Painful condition hurts me- I am deformed (10)
10. Section of undercover broadcast provides part of speech (4)
11. Way for queen to go? (3,4)
12. Head of investigators at once analysed poison (7)
13. Program introducing the French Gala? (5)
14. Piano Pete performed for officeholder (9)
15. Changing before probing dog on home ground at first (8)
16. Austrian gentleman trapped in Cyprus wood (6)

Down

1. A touch of gloss beats foundation (7)
2. Remains concerned with interminable vermin (5)
3. Coveted contest curbed by death (6)
4. Twelfth man wearing briefs proposes again (9)
5. Do nothing or get a vet around to castrate finally? (8)
6. For that reason drivers’ shout in support of the engineers (9)
7. Sounding as if daughter’s brother replaces her in ball (7)
8. Time hurdler over upright railings originally (4)
9. Ideal point of contact when Mary Jane holds up acid drops? (5,4)
10. Amuse degenerate adult with internet (9)
11. Shamelessly indecent while claiming the opposite? (8)
12. Supply miracle to win back from evil (7)
13. Staff made bitter possibly in this organisation? (7)
14. In Missouri meets lovely girl (6)
15. Accepted representative's band gear (4)
16. Constable perhaps abandoning father to get plant (5)