Come to sermonise facelessly (5)
I believe the answer is:
reach
'come to' is the definition.
(I've seen this in another clue)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for reach that I've seen before include "Arrive at - stretch of river" , "Arrive at, attain" , "Extend an arm" , "Put out the hand for a part of the river" , "Arrive at the destination" .)