Did remove them from speed dial by arrangement, kindly (6)
I believe the answer is:
please
'kindly' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for please that I've seen before include "If you'd be so kind?" , "Entertain" , "It's said to help" , "suit" , "Make happy or glad" .)