Times Cryptic Jumbo 854

[Annie Jay]

Struggling to finish this. Should be most grateful for help with the following please:
25dn Old Breton gives manic roar when agitated (9) A???R?C?N Looks like anagram of manic roar? Is 53ac imagine & 50 dn erato?

[vegasmad]

25d armorican - anagram of manic roar

[boxtops]

Armorican - yes it's an anagram as you suggest, ancient Breton

[bibblebub]

25d armorican http://dictionary.ref...n?r=75&src=ref&ch=dic

53a yes imagine

50d email (trouble after writer's picked up message)

[Annie Jay]

Thank you all so much. Sorry I forgot to put clues on for 50dn & 53ac but you came to my rescue anyway. So have any of you any idea about 56ac please? Colour of light initially fixed by engineer - sorted! (4,5) N?L? GREEN

[vegasmad]

nile green

[Annie Jay]

Oh dear, I'm ashamed. Thankyou.