Cryptic crossword No 2,413

Across

1. Charlie invested in show after accountant suggested a profitable venture (4,3)
2. Genuine confusion for CERN base following setback is enthralling (7)
3. Team gets quads massaged (5)
4. Highest position in France offers a fancy pen?  (4,5)
5. Tree has nuts (3)
6. The French Queen follows rugby… and she’s in charge! (5)
7. Quiet Eastern record is something you can count on to help you fall asleep (5)
8. Doctors welcoming return to Italian river to see falls  (5)
9. Switzerland taken in by a little German and his dog (9)
10. As an afterthought, head of family from Europe (unknown male) made up name (9)
11. Ugandan dictator goes by the book - what a fool!  (5)
12. Band of brothers find a place for relief (5)
13. Head chef holds onto independence (5)
14. Characters from the railway age (3)
15. Tackle or prepare for a situation we hear is supposed to happen (9)
16. Ben is confused for playwright (5)
17. Cry over nothing, then capture a weapon (7)
18. Breathed a sigh of relief, say, when former lover loudly called a cab (7)

Down

1. Dessert is almost late, after starters caused unexpected setback (7)
2. Broken spout hole? It's the end of the world! (9)
3. Police department has little hesitation serving alcohol (5)
4. Somewhere in SW London, bishop replaces priest after nun's head-piece put on (9)
5. Bleeps on a radio providing detection technique (5)
6. Catch a thief inside Havana bank (3)
7. Time to head South East and disappear (5)
8.  Leaked copy held by key Democrat (7)
9. Katsu shiitaki wraps might be on the menu in Japan (5)
10. Don't start stage whispers... we're on the edge!  (5)
11. Company has two thousand and one dry, essentially greedy decision makers (9)
12. It's all over when further education institution backs second clergyman over a student (9)
13. All over for bachelor after publicist gives trite, well-meaning statement (7)
14. Instructed Theodore to entertain artist at home (7)
15. Observe a musical composition (5)
16. Treasury established by Church  (5)
17. Trust artificial intelligence adopted by newspaper? Heading for harm! (5)
18. Writer in Nebraska, then Portugal, on retreat (3)