The apostrophe is important and should be included as a construction block either together with an 'a' or in it's own right.
Can you explain why? I'd remember better if I understood the reason.
Cancel the above question as I now understand. (It's an abbreviation for "ag" where the following word does not begin with a noun.)
What does "ag" do again?
Do you mean vowel instead of noun?
cluinntinn isn't there!