the i no 308

[clanargyll]

13d Opera opening coming up feel sick upset cold in here at the Palais Garnier (1,9)

I think its I dalliance based on the fact I cant see any other word to fit the letters from which I have to assume that a) I have other words wrong (bad)
and/ or b) I have the right answer but not the intelligence to understand why (pretty bad)

As ever any and all help welcomed and If by some chance option a proves to be the case please feel free to chip in the right answers for the offending across clues!

Hmm there is as ever another one to which I am unsure of if I was to say cape or cope for 20a a nod in the right direction would be great for anyone who is unfortunate not to have had the opportunity to attempt this fine example of brain gym wants to have a crack at it the clue is

Cloak here's carbon copy (4)

Perhaps since I am so shamefully inept at these things I should pack in, go boil an egg for brekky and then go do some WORK!!!!!!!

[bibblebub]

13d I PAGLIACCI [=opera]
opening coming up = 'gap' backwards' = PAG
feel sick upset = 'ail' backwards = LIA
cold = C
in = put all those inside...
here at the Palais Garnier = ICI ['here' in french]

2 C APE