9a projecting front of a mountain (4) - P*** - is it 'peak'? 19d all square up and down (5) - ***E* - is it 'level'? 12a 1980s sitcom could be smoother, too (4,2,5) - ***E *O *O*S* - is it 'home to...
14a bigger insect, one to get rid of, if returning to island group (7,8) - *R*A*E* A*T***E* - would seem to be 'greater anteater', but why and is there such a beast?
4d crime series, still it's news of a sort (6,7) - ****** *I***S* - is it 'silent witness'? 2d wild australian party (10) - ***U****** - is it 'saturnalia'?