Grinding very slowly through this, many I've got I can't see why.
1a Atmosphere in the centre fairly lively (9)
Sprightly?
8d One who's sore maybe after kicking small log over (2-5)
re-enter?
16a Bothered by "intervertebral", I, with a loaf that's poor.
Dreadful over-long anagram for A bear of very little brain. Is that synonymous with 'poor'?