A longshot for No5.(I think the claret is getting a grip). Cotoneaster.
A bird is angry=anagram of a bird name. Coot becomes Coto. "n" abbreviation of "in", as like "boys 'n the hood" sort of thing. + easter (occurs in the spring/main spring festival>
That fits, had to google it to see what a cotoneaster was but it fits. The "n" is a bit dodgy but does seem to work. Much much vaguer than the other 9 questions tho.