This is the last ones im stuck on
16d a voilent downpour of rain makes soldiers get right inside tent t?r?e?t
19d river country n????
22a flower girl n???l?a
24 atroublesome children lose time making mistakes e???r?
thanks for help
16d Torrent - R(oyal) E(ngineers) + r(ight) (in) 'tent'
19d Niger - name of both river & country
22a Nigella - name of girl & flower
24a Errors - lose t(ime) from 'terrors'