Stuck on three. 17a City in western Russia, on the Dnieper River (8). I have S-O-E-S-. 25a to hold firmly together (6). I have C-H-R-. 26d Carries out or completes (8). I have ---C-T-S. Help appreciated.
Many thanks Captain2 and shoota. I find I hav one more 27a British Sectretary of State for Northern Ireland who presided over the signing of the Good Friday Peace Agreement in 1998 (2,6)-O -O-L-M. May I impose yet again