Get the German punishment for treason (9) = ATTAINDER
get = ATTAIN, the German = DER
I would begin this Conservative declaration of love (7) = AMATORY
Double definition if split 2,1,4 with I at the beginning.
Liverpool’s colour kit adopted by Newcastle’s centre forward (9) = READDRESS
Liverpool’s colour = RED, kit = DRESS, adopted = containment, Newcastle’s centre = E
ATTAINDER = punishment for treason
AMATORY = of love