Hi Operatix - it's always best to post the full clues so that people without the puzzle can more readily help you. Also, beginning your own thread would ensure your Q's are seen on the front page - they can be missed when added to another thread :-)
That said -
24a Novel attempt to conceal a bit of one's weight? (6)
22d Country talk being broadcast (5)
26a A republic in Africa's overthrown queen (6)
24a - Trilby (novel, by George du Maurier) - '1 lb' (in) 'try'
22d Gab-on
26a Regina (queen) - 'a Niger' (back = overthrown)