Stuck on last two, your help appreciated. 24a Silly nerd bit animal in vulnerable place: ?i?d?r??? Birdrain fits the silly part, but I can't work out the rest. 19d Previous man of God: ?r??? Druid fits (and would tie in with Birdrain), what do we think?
'Tinderbox' can apply to, say, an area of a country that is known for sudden outbreaks of rebellion. 'The president said that the eastern mountains was a tinderbox, just waiting to burst into flames.' So that's a vulnerable place.