Thank you all;- Peterm + djaw (all correct), Tony (thanks for the clear breakdown); Jazzy and Ari (LOL). I append my workings, just for completion. See you next week, hopefully.
1. electronic = e; companion = CH (Companion of Honour); a dictionary = OED; yielding ECHOED = copied
2. Complex anag (turmoil) of ‘perverter’s mind in’ – ‘misprint’ = REVEREND = clerical Chambers Dict).
3. not all = ‘in’ = AMMO = shells
4. sailor = tar; first-class = A1 = ai; cabin = room. “returning = mo(rat)or + ia = MORATORIA = bans.
5. Cambridge, maybe = shire; real ‘baroque (anag ind)’ = rale; ‘when found in’ yields:- shir(rale)e = SHIRRALEE (alternative spelling of ‘shiralee’) = A swagman’s bundle (now obsolete = ‘old’ in the clue).
Ari! Off to my 7-course nosh now!!!