1: Charles talked about pictures of sea creatures (6,2,5)
 2: Everyone's embarrassed about university being enticed (7)
 3: Nationals eating spy? Gross! (9)
 4: Top communicator qualified to produce telegram (5)
 5: File abbreviated manuscript before trip promoting graphic series (9)
 6: Englishman opening a can to dine at home (3,2)
 7: Deranged parent has right to become a spouse (7)
 10: Teen unclothes poorly dressed diners (13)
 15: Incorrectly read pitch for a song (4,5)
 16: Be quick to make appearance with instrument (4,5)
 18: A Spanish guitarist goes out with one in Virginia (7)
 20: I'm getting old and you can't get over it (7)
 22: Farm branches, in part (5)
 23: Lustful inside, eager and young (5)